jcb 3CX Service Manual

3 - 20
3CX, 4CX, 214, 215, 217 & ‘S’ Series Machines
The policy of JCB is one of continuous improvement,
therefore as products develop, there may be variations to
the circuits.
Component Key
C Tank Cap
JJ Connections (as applicable)
P1 Pump, Main Section
P2 Pump, Secondary Section
P2A Pressure Test Point (auxiliary & unloader)
S Suction Line
T Tank
M Connections (as applicable)
MM Quick Release Couplings
1A Neutral Circuit Line
1B Neutral Circuit Line
2A Neutral Circuit Line
3 Loader Valve Block
3A Pressure Test Point (M.R.V.)
3B Unloader Pilot Valve
3C Loader Lift Ram Spool
3D Loader Shovel Ram Spool
3E Clamshovel Spool
3F Shovel Ram Head Side A.R.V.
3G Shovel Ram Rod Side A.R.V.
3J Load Hold Check Valve
3L Unloader Valve Spool
3M Main Relief Valve
3N Unloader Check Valve
3Q Hydraulic Speed Control Solenoid
4 Excavator Valve Block
Excavator services shown here are to the JCB control
pattern. If ISO, Case or Ford control pattern is used, the
excavator spools and relief valves will apply to different
services.
4A Slew Spool
4B Boom Spool
4C Stabiliser Spool
4D Stabiliser Spool
4E Dipper Spool
4F Bucket Spool
4G Hydraclamp Valve (Sideshift Machines Only)
4H Slew A.R.V.
4J Slew A.R.V.
4K Boom Ram Rod Side A.R.V.
4L Boom Ram Head Side A.R.V.
4M Dipper Ram Head Side A.R.V.
4N Dipper Ram Rod Side A.R.V.
4P Bucket Ram Head Side A.R.V.
5 Auxiliary Valve Block (foot operated)
5A Auxiliary Spool
5B A.R.V.
5C A.R.V.
6 In-tank Filter
6A Filter By-pass Valve
6B Suction Strainer
7 Priority Valve
8 Filter
9 Filter
10 Diverter Valve (hammer only)
11 Sequence Valve (hammer only)
12 Flow Regulator Valve
13 Anti-cavitation Check Valve
14 Check Valve (optional)
15 Smooth Ride System Selector Valve Assembly
16 Smooth Ride System Accumulator
26 Hydraulic Oil Cooler
31 Shovel Ram R.H.
32 Shovel Ram L.H.
33 Lift Ram R.H.
34 Lift Ram L.H.
35 Clam Shovel Ram R.H.
36 Clam Shovel Ram L.H.
38 2 Wheel Steer Power Track Rod
39 AWS Rear Axle Power Track Rod
40 AWS Front Axle Power Track Rod
41 AWS Valve Assembly
42 Steer Control Valve
43 Shock Valves
44 Steer Control Valve Relief Valve
51 Bucket Ram
52 Boom Ram
53 Stabiliser Ram
54 Stabiliser Ram
55 Dipper Ram
56 Left Hand Slew Ram
57 Right Hand Slew Ram
59 Stabiliser Check Valve
62 Hydraclamps (Sideshift Machines Only)
65 Restrictor
66 Dipper Restrictor with By-Pass
67 Manual Isolation Valve
68 Manual Change Over Valve
69 Extending Dipper Ram
70 High Flow Options
71 Low Flow options
Section E
Hydraulics
9803/3280
Section E
3 - 20
Issue 1
Circuit Schematics - Fixed Flow
JJ
MM
MM
MM
HIGH FLOW OPTIONS
LOW FLOW OPTIONS
M
11
M
68
69
67
Hammer
EXTENDING
DIPPER
A325660
70
71
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jcb 3CX Specifications

General

Brand	jcb
Model	3CX
Category	Compact Loader
Language	English