jcb JS240 User Manual

Service
Manual
JS200
from machine no. 705001
JS210
from machine no. 705648
JS220
from machine no. 705001
JS240
from machine no. 708001
JS260
from machine no. 708501
PUBLISHED BY THE
TECHNICAL PUBLICATIONS DEPARTMENT
OF JCB SERVICE; ©
WATERLOO PARK, UTTOXETER,
STAFFORDSHIRE, ST14 5PA, ENGLAND
Tel. ROCESTER (01889) 590312
PRINTED IN ENGLAND
Publication No. 9803/6400
R
General Information
Care & Safety
Routine Maintenance
Attachments
Body & Framework
Electrics
1
2
3
A
B
C
Hydraulics
E
F
Transmission
G
Brakes
J
Track & Running Gear
K
Engine
Issue 2

jcb JS240 Specifications

General

Brand	jcb
Model	JS240
Category	Excavators
Language	English

Summary

Care & Safety

Safety Notices

Explains the meanings of DANGER, WARNING, and CAUTION signal words used in the manual.

General Safety

Covers safety related to lifting equipment, clothing, alertness, raised equipment, and machine operation.

Operating Safety

Details safety precautions for engine, entering/leaving cab, controls, visibility, machine limits, exhaust gases, and hazardous atmospheres.

Maintenance Safety

Covers safety related to soft ground, metal splinters, communications, fuels, fires, batteries, and electrical circuits.

Routine Maintenance

Fluids and Lubricants

Lubricants - Health and Safety

Service Schedules

Details service intervals for hydraulic oil and filters when using attachments like breakers or crushers.

Hydraulics

Details air bleeding procedures for the hydraulic system, including releasing tank pressure.

Transmission

Covers checking and changing the track gearbox oil and replenishing slew gearbox grease.

Tracks and Running Gear

Provides instructions for cleaning and rotating the tracks, and inspecting track rollers for damage.

Engine

Provides instructions for changing the air filter elements.

FOPS Structure

Details checking the FOPS mounting bolts for correct torque tightness and warns about operating with a damaged FOPS.

Electrics

The A.M.S. system

Schematic Diagram

Lists main components and their corresponding numbers for the schematic diagram of the electrics system.

Engine Control

Explains the basic operation of the electric throttle motor and the stepping motor system.

Pump Control

Provides a schematic diagram for pump control and current values for different machine modes.

Self Test

Introduces the self-test function, listing monitored sensors and the items displayed on the MESSAGE and CLOCK displays.

Hydraulics

Torque Specification

Schematics

Lists components for the hydraulic circuit schematic of JS200 and variants.

Pressure Testing

Details the procedure for testing main relief valve pressure, including high and low pressure settings.

Hydraulic Pump JS200, JS240

Provides technical data and pressure readings for the proportional pressure reduction valve in different operating modes.

Regulator JS200, JS240

Control Valve JS200/JS240

Relief Valve JS200/JS240

Negative Control Relief Valve JS200/JS240

Stacked (Slew Brake) Valve

Hydraulic Rams

Transmission

Motor/Gearbox

Fault Finding

Lists possible causes and countermeasures for piston motor faults like not running or slow speed.

Maintenance Specifications

Track and Running Gear

Torque Specifications JS200/JS240

Dismantling

Removal

Replacement

Dismantling (Two and Four bolt pedestal)

Dismantling (continued)

Assembly

Wear Limits

Engine