2 - 8
Section E
9803/3280
Section E
2 - 8
Issue 2*
Technical Data
Relief Valve Pressures
Excavator Valve - Fixed Flow
Component Key:
1
Bucket crowd
2
Dipper †
3
Stabiliser
4
Stabiliser
5
Boom †
6
Slew
7
Auxiliary relief valve
8
Tank port
9
High pressure carry-over (HPCO) port
10
Service ports
11
Load hold check valve assemblies
12
Make-up check valve assembly
13
Inlet port
14
Hydraclamp solenoid
bar
kgf/cm
2
lbf/in
2
Boom Ram Head Side
248 - 255
253 - 260
3600 - 3700
Boom Ram Rod Side
345 - 352
351 - 358
5000 - 5100
Bucket Ram Head Side
Centremount (17' , 15’ 6” backhoe - except knuckle)
310 - 317
316 - 323
4500 - 4600
Centremount (14' backhoe, 15’ 6” backhoe with a knuckle fitted)
248 - 255
253 - 260
3600 - 3700
Sideshift
248 - 255
253 - 260
3600 - 3700
Bucket Ram Rod Side (Machines with Rockbreaker only)
248 - 255
253 - 260
3600 - 3700
Dipper Ram Head Side
248 - 255
253 - 260
3600 - 3700
Dipper Ram Rod Side
248 - 255
253 - 260
3600 - 3700
Slew Left and Right
262 - 269
267 - 274
3800 - 3900
Weight:
44 kg (97 lbs) - Centremount
46 kg (101 lbs) - Sideshift
Note
: Instructions for pressure testing and adjustment are described in
Service Procedures, Loader Valve - Pressure
Testing
.
† System shown is for JCB plus pattern and JCB diagonal pattern. For ISO system, the boom and dipper spools change
position, i.e. boom is position 2 and dipper is position 5. The bottom ARV from spool 5 will also be swapped with the
bottom ARV from spool 2.
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