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Complete workshop & service manual with electrical wiring diagrams for Caterpillar 120H & 135H Motor Graders. It’s the same service manual used by dealers that guaranteed to be fully functional and intact without any missing page.
This Caterpillar 120H & 135H Motor Graders service & repair manual (including maintenance, overhaul, disassembling & assembling, adjustment, tune-up, operation, inspecting, diagnostic & troubleshooting…) is divided into different sections. Each section covers a specific component or system with detailed illustrations. 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. The printer-ready PDF documents work like a charm on all kinds of devices.
MANUAL LIST:
RENR1416 – Specifications (120H & 135H Motor Graders Air System & Brakes)
RENR1431 – Schematic (120H Motor Grader ES Version Hydraulic Systems)
RENR1439 – Schematic (120H Motor Grader (ES Version) Electrical System)
SENR6984 – Schematic (120H (ES Version) Motor Grader Electrical System)
SENR6994 – Specifications (120H & 135H Motor Graders Power Train)
SENR8523 – Specifications (120H & 135H Motor Graders Air System & Brakes)
SENR8538 – Disassembly & Assembly (Supplement for 120H & 135H Motor Graders – 3116 Engine)
SENR8543 – Disassembly & Assembly (120H & 135H Motor Graders Power Train)
SENR8544 – Disassembly & Assembly (120H & 135H Motor Graders Machine System)
SENR8557 – Specifications (120H Motor Grader Hydraulic & Steering System)
SENR8592 – Schematic (120H ES Version Motor Grader Hydraulic Systems)
SENR9059 – Specifications (120H, 12H, 135H, 140H, 143H, 14H, 160H, 163H & 16H Motor Graders Secondary Steering System)
SENR9059 – Systems Operation (120H, 12H, 135H, 140H, 143H, 14H, 160H, 163H & 16H Motor Graders Secondary Steering System)
SENR9059 – Testing & Adjusting (120H, 12H, 135H, 140H, 143H, 14H, 160H, 163H & 16H Motor Graders Secondary Steering System)
SENR9102 – Schematic (120H ES Version Motor Grader Hydraulic Systems)
SENR9157 – Specifications (120H & 135H Motor Graders Power Train)
SENR9179 – Specifications (120H & 135H Motor Graders Hydraulic & Steering System)
RENR1426 – Schematic (120H & 135H Motor Grader Standard Version Electrical System).pdf
RENR1440 – Schematic (120H & 135H Motor Grader Standard Version Electrical System).pdf
SENR8570 – 120H & 135H Standard Versions Motor Graders Hydraulic System.pdf
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EXCERPT:
1. Remove plug (1) and drain the oil from the circle drive housing in a suitable container for storage or disposal. The capacity of the circle drive housing is 7 L (1.8 gal U.S.). Install plug (1).
2. Bend lock (2) away from nut (3).
3. Remove nut (3), lock (2), spacer (4) and the O-ring seal from circle drive shaft (7).
4. Remove nuts (6) and washers from the long studs of the circle drive housing.
5. Install Tooling (A) and a hoist to the circle drive housing.
6. Remove bolts (8) and the spacers that hold the circle drive housing to the circle draw bar.
7. Lift the circle drive enough in order to remove pinion gear (5) from shaft (7) and from engagement with the circle. Remove the circle drive from the circle. The weight of the circle drive is 45 Kg (100 lb).
8. Remove the Duo-Cone seal from the pinion.
Install Circle Drive
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