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Complete digital official shop manual contains service, maintenance, and troubleshooting information for the Caterpillar 931, 941, 941B, 951, 951B, 951C Track-Type Loader. Diagnostic and repair procedures are covered in great detail to repair, maintain, rebuild, refurbish or restore your Caterpillar 941, 941B, 951B, 951C Track-Type Loader like a professional mechanic in local service/repair workshop. This cost-effective quality manual is 100% complete and intact as should be without any missing pages. It is the same factory shop manual used by dealers that guaranteed to be fully functional to save your precious time.
This manual for Caterpillar 931, 941, 941B, 951, 951B, 951C Traxcavator is divided into different sections. Each section covers a specific component or system and, in addition to the standard service procedures, includes disassembling, inspecting, and assembling instructions. A table of contents is placed at the beginning of each section. Pages are easily found by category, and each page is expandable for great detail. It is in the cross-platform PDF document format so that it works like a charm on all kinds of devices. You do not need to be skilled with a computer to use the manual.
FILELIST:
UEG0689S – Parts Book (951C Traxcavator SN86J2598-86J4041).pdf
UEG0689S – Parts Book (951C Traxcavator SN86J2598-up).pdf
REG00957 – Service Manual – Disassembly & Assembly (941-951B Power Train).pdf
REG00803 – System Operation, Testing & Adjusting (951 Track-Type Loader Power Train).pdf
GEG00582 – Lubrication & Maintenance Guide (951 Traxcavator).pdf
GEG00986 – Lubrication & Maintenance Guide (951 Traxcavator).pdf
REG00776 – System Operation, Testing & Adjusting (941B & 951C Track-Type Loader Hydraulic System).pdf
REG01400 – Service Manual – Disassembly & Assembly (Four & Six Cylinder 4.75″ Bore Engines Sleeve Metering Fuel System).pdf
REG00684 – Disassembly & Assembly (General Instructions).pdf
Service Manual – Disassembly & Assembly – 941-951 Engine.pdf
SENR2076 – Specifications (951 Track-Type Loader Power Train).pdf
SENR2003 – Specifications (941 B & 951C Track-Type Loader Hydraulic System).pdf
REG00958 – Service Manual – Disassembly & Assembly (941-951 Loader Components).pdf
REG00878 – Service Manual – Flow Meter TEE Test Procedure – I.pdf
Service Manual – Disassembly & Assembly – 941-951 Tool Charts.pdf
REG00998 – Service Manual – Flow Meter Tee Test Procedure.pdf
REG01325 – Systems Operation (931 Track-Type Loader Power Train).pdf
REG00910 – Service Manual – Flow Meter TEE Test – Tools.pdf
REG00541 – Systems Operation (941 Track-Type Loader Power Train).pdf
REG01328 – Testing & Adjusting (931 Track-Type Loader Hydraulic System).pdf
REG01328 – Systems Operation (931 Track-Type Loader Hydraulic System).pdf
REG01333 – Testing & Adjusting (Power Shift Transmission (D5)).pdf
REG00955 – General Service Information (941 & 951 Engine Tool Selection Chart).pdf
REG01324 – Testing & Adjusting (Power Shift Transmission).pdf
REG01332 – Testing & Adjusting (941_951 Power Shift Transmission).pdf
REG00540 – Control Valve & Tank (163 Hydraulic Control).pdf
REG00540 – Systems Operation (163 Hydraulic Control).pdf
REG00540 – Testing & Adjusting (163 Hydraulic Control).pdf
SENR3581 – Specifications (37-MT, 41-MT, & 42-MT Series Starting Motors).pdf
REG01325 – Testing & Adjusting (931 Track-Type Loader Power Train).pdf
RENR1252 – Specifications (26SI Series Alternator).pdf
SENR4130 – Specifications (HDB Series & M1 Series Heavy Duty Brushless Alternators).pdf
SENR7951 – Schematic (941B & 951C Track-Type Loader Hydraulic System).pdf
REG00541 – Testing & Adjusting (941 Track-Type Loader Power Train).pdf
SENR2082 – Specifications (N3 Series Brushless Alternators).pdf
REG01326 – Testing & Adjusting (931 Power Shift Transmission).pdf
941B & 951C Track-Type Loader Hydraulic System Schematic.pdf
941B & 951C Track-Type Loader Hydraulic System Schematic.djvu
REG00540 – Specifications (163 Hydraulic Control)
REG00956 – Disassembly & Assembly (941 & 951 Engine)
REG01327 – Specifications (931 Track-Type Loader Power Train)
RENR1252 – Disassembly & Assembly (26SI Series Alternator)
RENR1252 – Systems Operation (26SI Series Alternator)
RENR1252 – Testing & Adjusting (26SI Series Alternator)
SENR2003 – Specifications (941B & 951C Track-Type Loader Hydraulic System)
SENR2082 – Systems Operation (N3 Series Brushless Alternators)
SENR2082 – Testing & Adjusting (N3 Series Brushless Alternators)
SENR2082 – Troubleshooting (N3 Series Brushless Alternators)
SENR3334 – Disassembly & Assembly (Air Conditioning & Heating R-12 All Caterpillar Machines)
SENR3334 – Specifications (Air Conditioning & Heating R-12 All Caterpillar Machines)
SENR3334 – Systems Operation (Air Conditioning & Heating R-12 All Caterpillar Machines)
SENR3334 – Testing & Adjusting (Air Conditioning & Heating R-12 All Caterpillar Machines)
SENR3581 – Disassembly & Assembly (37-MT, 41-MT, & 42-MT Series Starting Motors)
SENR3581 – Systems Operation (37-MT, 41-MT, & 42-MT Series Starting Motors)
SENR3581 – Testing & Adjusting (37-MT, 41-MT, & 42-MT Series Starting Motors)
SENR3581 – Troubleshooting (37-MT, 41-MT, & 42-MT Series Starting Motors)
SENR4130 – Disassembly & Assembly (HDB Series & M1 Series Heavy Duty Brushless Alternators)
SENR4130 – Systems Operation (HDB Series & M1 Series Heavy Duty Brushless Alternators)
SENR4130 – Testing & Adjusting (HDB Series & M1 Series Heavy Duty Brushless Alternators)
SENR4130 – Troubleshooting (HDB Series & M1 Series Heavy Duty Brushless Alternators)
SENR7001 – Specifications (941 Track-Type Loader Power Train)
├── 941B & 951C Track-Type Loader Hydraulic System Schematic.djvu
├── 941B & 951C Track-Type Loader Hydraulic System Schematic.pdf
├── GEG00582 – Lubrication & Maintenance Guide (951 Traxcavator).pdf
├── GEG00986 – Lubrication & Maintenance Guide (951 Traxcavator).pdf
├── REG00540 – Control Valve & Tank (163 Hydraulic Control).pdf
├── REG00540 – Specifications (163 Hydraulic Control)
│ ├── Blade Lift Cylinder (5J8173).pdf
│ ├── Blade Tilt Cylinder (2J1402).pdf
│ ├── Control Valve (5J9869).pdf
│ ├── Control Valve (6J3117).pdf
│ ├── External Valve (4J487).pdf
│ ├── Hydraulic Oil Pump (6J7400 & 7J607).pdf
│ ├── Oil Filter.pdf
│ ├── Pressure Relief Valves (4J801 & 4J1129).pdf
│ └── Ripper Cylinder (2K3663.pdf
├── REG00540 – Systems Operation (163 Hydraulic Control).pdf
├── REG00540 – Testing & Adjusting (163 Hydraulic Control).pdf
├── REG00541 – Systems Operation (941 Track-Type Loader Power Train).pdf
├── REG00541 – Testing & Adjusting (941 Track-Type Loader Power Train).pdf
├── REG00684 – Disassembly & Assembly (General Instructions).pdf
├── REG00776 – System Operation, Testing & Adjusting (941B & 951C Track-Type Loader Hydraulic System).pdf
├── REG00803 – System Operation, Testing & Adjusting (951 Track-Type Loader Power Train).pdf
├── REG00878 – Service Manual – Flow Meter TEE Test Procedure – I.pdf
├── REG00910 – Service Manual – Flow Meter TEE Test – Tools.pdf
├── REG00955 – General Service Information (941 & 951 Engine Tool Selection Chart).pdf
├── REG00956 – Disassembly & Assembly (941 & 951 Engine)
│ ├── Air Induction And Exhaust System.pdf
│ ├── Basic Block Components.pdf
│ ├── Cooling System Components.pdf
│ ├── Crankshaft Front Oil Seal.pdf
│ ├── Engine Removal And Installation.pdf
│ ├── Flywheel And Flywheel Housing.pdf
│ ├── Fuel System Components.pdf
│ ├── Important Information.pdf
│ ├── Lubrication System Components.pdf
│ ├── Timing Gear Cover.pdf
│ └── Timing Gears.pdf
├── REG00957 – Service Manual – Disassembly & Assembly (941-951B Power Train).pdf
├── REG00958 – Service Manual – Disassembly & Assembly (941-951 Loader Components).pdf
├── REG00998 – Service Manual – Flow Meter Tee Test Procedure.pdf
├── REG01324 – Testing & Adjusting (Power Shift Transmission).pdf
├── REG01325 – Systems Operation (931 Track-Type Loader Power Train).pdf
├── REG01325 – Testing & Adjusting (931 Track-Type Loader Power Train).pdf
├── REG01326 – Testing & Adjusting (931 Power Shift Transmission).pdf
├── REG01327 – Specifications (931 Track-Type Loader Power Train)
│ ├── Bevel Gear And Pinion Shaft Free Movement (Backlash).pdf
│ ├── Bevel Gear And Pinion.pdf
│ ├── Brake Adjustment.pdf
│ ├── Control Linkage For Transmission.pdf
│ ├── Final Drive.pdf
│ ├── Front Idler And Recoil Spring.pdf
│ ├── Hydraulic Controls (1P571).pdf
│ ├── Introduction.pdf
│ ├── Lubrication Relief Valve (9S6979).pdf
│ ├── Oil Pump For The Transmission (1P4165).pdf
│ ├── Plugs For Steering Clutch Case.pdf
│ ├── Pressures For The Hydraulic Controls.pdf
│ ├── Rollover Protective Structure (Rops).pdf
│ ├── Steering Clutch Adjustment.pdf
│ ├── Steering Clutch.pdf
│ ├── Track Adjusting Mechanism.pdf
│ ├── Track Rollers.pdf
│ ├── Track.pdf
│ ├── Transfer Gears.pdf
│ ├── Transmission (2P2945).pdf
│ ├── Undercarriage Support.pdf
│ └── Universal Joint.pdf
├── REG01328 – Systems Operation (931 Track-Type Loader Hydraulic System).pdf
├── REG01328 – Testing & Adjusting (931 Track-Type Loader Hydraulic System).pdf
├── REG01332 – Testing & Adjusting (941_951 Power Shift Transmission).pdf
├── REG01333 – Testing & Adjusting (Power Shift Transmission (D5)).pdf
├── REG01400 – Service Manual – Disassembly & Assembly (Four & Six Cylinder 4.75″ Bore Engines Sleeve Metering Fuel System).pdf
├── RENR1252 – Disassembly & Assembly (26SI Series Alternator)
│ ├── Alternator – Assemble.pdf
│ └── Alternator – Disassemble.pdf
├── RENR1252 – Specifications (26SI Series Alternator).pdf
├── RENR1252 – Systems Operation (26SI Series Alternator)
│ ├── Component Description.pdf
│ ├── General Information.pdf
│ └── Normal Operation.pdf
├── RENR1252 – Testing & Adjusting (26SI Series Alternator)
│ ├── Component – Test.pdf
│ ├── General Information.pdf
│ ├── Initial Troubleshooting Procedure.pdf
│ ├── T1 Alternator Output – Test.pdf
│ ├── T2 Electrical System Current – Test.pdf
│ ├── T3 Charging System – Test.pdf
│ ├── T4 Alternator Drive System – Check.pdf
│ ├── T5 Alternator Current – Test.pdf
│ ├── T6 Residual Magnetism Restoration.pdf
│ ├── T7 Identifying Source of Current Draw – Test.pdf
│ └── T8 Alternator Overcharging – Test.pdf
├── SENR2003 – Specifications (941 B & 951C Track-Type Loader Hydraulic System).pdf
├── SENR2003 – Specifications (941B & 951C Track-Type Loader Hydraulic System)
│ ├── Auxiliary Control Valve (5J9115).pdf
│ ├── Cylinders.pdf
│ ├── Hydraulic Pump (7J583).pdf
│ ├── Hydraulic Pump (7J584).pdf
│ ├── Hydraulic Pump (8J8367 & 9J5080).pdf
│ ├── Introduction.pdf
│ ├── Loader Frame.pdf
│ ├── Main Control Valve (5J9114).pdf
│ ├── Master Valve For The Bucket Positioner (8J82).pdf
│ ├── Master Valve For The Bucket Positioner (Early Machines) (5J6701).pdf
│ ├── Relief Valve (Head End Of Tilt Cylinder) (5J9107).pdf
│ ├── Relief Valve (Rod End Of Tilt Cylinder) (5J9106).pdf
│ ├── Relief Valve For Main Pressure (3G2350).pdf
│ └── Relief Valve For Main Pressure (5J9113).pdf
├── SENR2076 – Specifications (951 Track-Type Loader Power Train).pdf
├── SENR2082 – Specifications (N3 Series Brushless Alternators).pdf
├── SENR2082 – Systems Operation (N3 Series Brushless Alternators)
│ ├── Component Description.pdf
│ ├── General Information.pdf
│ └── Normal Operation.pdf
├── SENR2082 – Testing & Adjusting (N3 Series Brushless Alternators)
│ ├── Alternator – Assemble.pdf
│ ├── Alternator – Disassemble.pdf
│ ├── Capacitor – Test.pdf
│ ├── Field Winding – Test.pdf
│ ├── Rectifier – Test.pdf
│ ├── Regulator – Test.pdf
│ ├── Residual Magnetism – Restore.pdf
│ └── Stator – Test.pdf
├── SENR2082 – Troubleshooting (N3 Series Brushless Alternators)
│ ├── Charging System.pdf
│ ├── General Information.pdf
│ └── Service Tools.pdf
├── SENR3334 – Disassembly & Assembly (Air Conditioning & Heating R-12 All Caterpillar Machines)
│ ├── General Information.pdf
│ ├── In-Line Refrigerant Dryer – Remove and Install.pdf
│ ├── Machine Preparation for Disassembly and Assembly.pdf
│ ├── Receiver-Dryer – Remove and Install.pdf
│ ├── Refrigerant Accumulator – Remove and Install.pdf
│ ├── Refrigerant Compressor – Remove and Install.pdf
│ ├── Refrigerant Expansion Valve – Remove and Install.pdf
│ └── Refrigerant Orifice Tube – Remove and Install.pdf
├── SENR3334 – Specifications (Air Conditioning & Heating R-12 All Caterpillar Machines)
│ ├── Refrigerant Compressor 1.pdf
│ ├── Refrigerant Compressor 2.pdf
│ ├── Refrigerant Compressor.pdf
│ └── System Capacities for Refrigerant.pdf
├── SENR3334 – Systems Operation (Air Conditioning & Heating R-12 All Caterpillar Machines)
│ ├── Cab Air Filters.pdf
│ ├── Evaporator Coil.pdf
│ ├── General Information.pdf
│ ├── Glossary of Terms.pdf
│ ├── Heating System Schematic.pdf
│ ├── Heating and Air Conditioning Control System.pdf
│ ├── Identifying the Air Conditioning System.pdf
│ ├── Preparation of Air Conditioner Units for Seasonal Use.pdf
│ ├── Receiver-Dryer.pdf
│ ├── Refrigerant Accumulator.pdf
│ ├── Refrigerant Compressor.pdf
│ ├── Refrigerant Condenser.pdf
│ ├── Refrigerant Expansion Valve System.pdf
│ ├── Refrigerant Expansion Valve.pdf
│ └── Refrigerant Orifice Tube System.pdf
├── SENR3334 – Testing & Adjusting (Air Conditioning & Heating R-12 All Caterpillar Machines)
│ ├── Air Conditioning System Troubleshooting.pdf
│ ├── General Troubleshooting Information.pdf
│ ├── Machine Preparation for Troubleshooting.pdf
│ ├── Manifold Gauge Set (Refrigerant) – Install.pdf
│ ├── Manifold Gauge Set (Refrigerant) – Remove.pdf
│ ├── Refrigerant Compressor Oil – Check.pdf
│ ├── Refrigerant Leakage – Test.pdf
│ ├── Refrigerant Recovery.pdf
│ ├── Refrigerant System – Charge.pdf
│ ├── Refrigerant System – Evacuate.pdf
│ ├── Required Tools.pdf
│ ├── Troubleshooting Heating and Air Conditioning Control System.pdf
│ └── Visual Inspection.pdf
├── SENR3581 – Disassembly & Assembly (37-MT, 41-MT, & 42-MT Series Starting Motors)
│ ├── General Information.pdf
│ ├── Starting Motor – Assemble – 37-MT and 41-MT.pdf
│ ├── Starting Motor – Assemble – 42-MT.pdf
│ ├── Starting Motor – Disassemble – 37-MT and 41-MT.pdf
│ └── Starting Motor – Disassemble – 42-MT.pdf
├── SENR3581 – Specifications (37-MT, 41-MT, & 42-MT Series Starting Motors).pdf
├── SENR3581 – Systems Operation (37-MT, 41-MT, & 42-MT Series Starting Motors)
│ ├── Component Description.pdf
│ ├── General Information.pdf
│ └── Normal Operation.pdf
├── SENR3581 – Testing & Adjusting (37-MT, 41-MT, & 42-MT Series Starting Motors)
│ ├── Brush and Brush Holder – Check.pdf
│ ├── No Load – Test.pdf
│ ├── Pinion Clearance – Adjust.pdf
│ └── Starting Motor Solenoid – Test.pdf
├── SENR3581 – Troubleshooting (37-MT, 41-MT, & 42-MT Series Starting Motors)
│ ├── Engine Does Not Crank with Starting Motor On and Pinion Engaging Ring Gear.pdf
│ ├── General Information.pdf
│ ├── Service Tools.pdf
│ └── Starting Motor Does Not Turn or Turns Slowly.pdf
├── SENR4130 – Disassembly & Assembly (HDB Series & M1 Series Heavy Duty Brushless Alternators)
│ ├── Alternator – Disassemble – HDB Series Alternator.pdf
│ └── Alternator – Disassemble – M1 Series Alternator (35 Amp).pdf
├── SENR4130 – Specifications (HDB Series & M1 Series Heavy Duty Brushless Alternators).pdf
├── SENR4130 – Systems Operation (HDB Series & M1 Series Heavy Duty Brushless Alternators)
│ ├── Component Description.pdf
│ ├── General Information.pdf
│ └── Normal Operation.pdf
├── SENR4130 – Testing & Adjusting (HDB Series & M1 Series Heavy Duty Brushless Alternators)
│ ├── Capacitor – Test.pdf
│ ├── Field Winding – Test.pdf
│ ├── Rectifier – Test.pdf
│ ├── Regulator – Test.pdf
│ ├── Residual Magnetism – Restore.pdf
│ └── Stator – Test.pdf
├── SENR4130 – Troubleshooting (HDB Series & M1 Series Heavy Duty Brushless Alternators)
│ ├── Charging System.pdf
│ ├── General Information.pdf
│ └── Service Tools.pdf
├── SENR7001 – Specifications (941 Track-Type Loader Power Train)
│ ├── Alignment Of Track Roller Frame.pdf
│ ├── Bevel Gear And Steering Clutch (Lever Steer).pdf
│ ├── Bevel Gear And Steering Clutch (Pedal Steer).pdf
│ ├── Bevel Pinion.pdf
│ ├── Case And Cover For Steering Clutch.pdf
│ ├── Checking And Adjusting Alignment Of The Flexible Coupling Drive.pdf
│ ├── Controls For The Steering Clutch (Lever Steer).pdf
│ ├── Filter For Steering Clutch (Pedal Steer).pdf
│ ├── Final Drive.pdf
│ ├── Flexible Coupling Drive (Earlier 5S3740.pdf
│ ├── Flexible Coupling Drive (Later 5S3740).pdf
│ ├── Front Idler And Recoil Spring.pdf
│ ├── Hydraulic Control For Steering Clutch (Pedal Steer).pdf
│ ├── Hydraulic Controls For The Transmission.pdf
│ ├── Introduction.pdf
│ ├── Oil Pump For The Steering Clutch (Pedal Steer) (5S7863).pdf
│ ├── Rollover Protective Structure (ROPS).pdf
│ ├── Torque Converter (1T760).pdf
│ ├── Track Carrier Roller.pdf
│ ├── Track Roller Frame.pdf
│ ├── Track Rollers.pdf
│ ├── Track.pdf
│ ├── Transmission Filter (4S8679).pdf
│ ├── Transmission Pump (4S8660).pdf
│ └── Transmission.pdf
├── SENR7951 – Schematic (941B & 951C Track-Type Loader Hydraulic System).pdf
├── Service Manual – Disassembly & Assembly – 941-951 Engine.pdf
├── Service Manual – Disassembly & Assembly – 941-951 Tool Charts.pdf
├── UEG0689S – Parts Book (951C Traxcavator SN86J2598-86J4041).pdf
└── UEG0689S – Parts Book (951C Traxcavator SN86J2598-up).pdf
…
EXCERPT:
Torque Converter, Transmission And Bevel Pinion
Refer to SERVICE GUIDE for Preliminary Information.
Bottom Removal (Preferred Method)
1. Place machine on 12 in. (304,8 mm) blocks.
2. Position skid plate, 3 ft. x 4 ft. (0,91 x 1,22 m) under transmission.
3-3/4″ NC forged eyebolts (three). Attach chains. Forward chain should be adjustable to assure maneuverability of the transmission in this comparatively tight space. 4-Fuel line. Take care not to damage this line during transmission removal and installation.
View from beneath machine.
5-Flywheel housing bolts (four). These are removed to provide clearance.
6-Transmission support bracket. 7-Bolts and washers (ten each).
8. Move transmission forward to clear bevel pinion. Lengthen forward chain slightly, and lower transmission to the floor.
Transmission removal.
Top Removal (Alternate Method)
1. Drain the oil filter.
2. Remove oil filter cover assembly to obtain additional clearance.
3. Follow Steps 3, 4, 5, 6 and 7 as outlined in topic BOTTOM REMOVAL.
4. Move transmission forward to clear bevel pinion.
5. Raise bevel pinion end and lower torque converter end.
6. Insert four 1/2″ NC forged eyebolts in bevel pinion housing, and attach chains.
7. Manuever the transmission until it is in position shown and lift transmission from machine.
Torque Converter Removal And Installation
Refer to SERVICE GUIDE for Preliminary Information.
The single stage torque converter is mounted in the torque converter housing on the front of the transmission case.
1. Position transmission on blocks with transfer gears down. Work on a clean surface to avoid introducing dirt into the torque converter or the fluid system. Protect all internal parts of the torque converter during servicing to prevent bumping, burring, scratching, or damaging.
2-Line from transmission sump. 3-Bolts (fifteen). Use two 3/8″-16 forcing screws to separate torque converter case from transmission housing. 4-1/2″ NC forged eyebolts (two). Attach chains and remove torque converter and cover assembly. Position output side down on suitable blocks. 5-Bolts (four). 6-Bolts (fifteen). Use two as forcing screws to separate cover assembly from torque converter case. 7-Cover assembly and lubrication units. Lift from torque converter case. 8-Torque converter case. Invert case and torque converter. Remove the eight case-to-carrier bolts. At installation, tighten the bolts to 34-38 lb. ft. (4,12-4,68 m.kg). 9-Torque converter.
10. There are two cored passages in the output end of the torque converter case. At installation, these passages must align with their counterparts in the torque converter carrier assembly.
Torque Converter Disassembly And Assembly
4 At installation, passages in carrier (4) must align with passages in torque converter case.
5, 6, 14 Use four of the bolts (5) as forcing screws to separate impeller (6) from housing (14).
7 When separating stator (7) from impeller, use small wooden blocks under pry bar to prevent damage to impeller.
8, 9, 10, 11, 12, 13 Use an arbor press and 6 in. (152,44 mm) or larger blocks to press drive shaft (8) from carrier (10), bearing (12), races (11 and 13), and turbine (9).
…