Part of the JCB Repair Manuals.
Looking for the exact factory procedures to keep your JCB JZ 70 excavator running? This 318-page JCB jz 70 service manual pdf (OEM #9803/6030) breaks down the complete undercarriage, hydraulic pump, and electrical system. Inside, you get complete wiring diagrams showing every connector mating face, plus detailed hydraulic schematics for the main pump and remote control valves. Open to the transmission section for step-by-step teardown instructions covering the top roller, idler wheel, and track links. Lock down the lower track rollers to 109-127 Nm and swap out the main engine oil filter element every 100 operating hours. Stop wasting hours tracing electrical faults blind in the dirt. Download this bookmarked file right to your tablet, find your exact torque spec instantly, and get your machine moving again.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General Information | 1-16 | Service Tools |
| Care & Safety | 17-22 | Safety Notices, General Safety, Operating Safety, Maintenance Safety |
| Routine Maintenance | 23-58 | Service Schedules, Greasing, Hydraulics, Tracks and Running Gear |
| Attachments | 59-78 | Direct Glazing, Air Conditioning System Diagnosis |
| Electrics | 79-162 | Layout, Monitor Panel, Ems System, Functional Description, Throttle Control System, Electrical Schematics, Connector Mating Face Views |
| Controls | 163-272 | Schematics, Fault Finding, Hydraulic Pump, Hydraulic Pump Dismantling, Hydraulic Pump Assembly, Remote Control Valve Services, Dismantling and Assembly, Control Valve |
| Transmission | 273-313 | Fault Finding, Removal and Replacement, Tracks, Replacement, Replacing a Track Link, Idler Wheel and Recoil Unit, Idler Wheel Assembly, Top Roller |
| Brakes | 314 | |
| Engine | 315-318 | Technical Data, Air Filter Elements, Oil Level and Filter, Coolant Level and Mixtures, Fan Belt Tension, Fuel System Maintenance |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Upper (Carrier) Roller Torque | 267~312 Nm | p. 7 |
| Lower (Track) Roller Torque | 109~127 Nm | p. 7 |
| Fuel Filter Element Replacement Interval | Every 100 Operating Hours or 2-Weekly | p. 28 |
| Water Separator Draining Interval | at least every 50 hours | p. 55 |
| Engine Oil Main Filter Element Replacement Interval | Every 100 Operating Hours or 2-Weekly | p. 28 |
| Fan Belt Slack | 10 mm (0.4 in) | p. 54 |
| Track Gearbox Oil Capacity | 2 x 1.7 litres (0.37 UK gal) (0.44 US gal) | p. 25 |
| Track Gearbox Oil Replacement Interval | Every 100 Operating Hours or 2-Weekly | p. 28 |
| Hydraulic System Capacity | 92 litres (20.26 UK gal) (24.33 US gal) | p. 25 |
| Hydraulic Oil Sampling Interval (100% Breaker Use) | Every 200 hrs | p. 27 |
| Battery Electrolyte Level | 6 mm (0.25 in) above the plates | p. 34 |
| Battery Specific Gravity (Fully Charged, up to 27 °C) | 1.270-1.290 | p. 82 |
