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Section E
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
9803/3280
Hydraulics
Circuit Schematics - Fixed Flow
Purchased from www.WorkshopManuals.co.uk
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
70
HIGH FLOW OPTIONS
71
LOW FLOW OPTIONS
JJ
Hammer
69
M
M
68
67
11
EXTENDING
DIPPER
Section E
3 - 20
MM
MM
MM
A325660
Issue 1
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