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Section 4 – Troubleshooting Information
4.3 Hydraulic System
4.3-1 All Controls Inoperative
1. Broken or defective drive pump shaft or coupling. Check pump shaft and coupling. Replace if
2. Hydraulic oil level low.
4.3-2 All Boom Functions Inoperative
1. System pump P2 out of adjustment or is
defective.
2. Stuck or defective relief valve RV1.
3. Open or defective dump/ enable valve 2H-21A.
4. Stuck or defective LS bleed off valve FR1.
4.3-3 No Main Boom Up or Down
No Main Boom Up:
1. Stuck or defective differential sensing valve
DSV3.
2. Stuck or defective boom up valve 4H-14.
3. Stuck or defective valve V6 (stuck open, or leak
to tank port).
4. Stuck or defective check valve CV16 (stuck open,
or leak to tank port).
5. Stuck or defective check valve CV13.
229044ADA
128
defective.
Check oil level. Fill to proper level.
Refer to section 5 for pump set up procedure.
Adjust 3H-V1 and 3H-V2 to spec. Replace if
defective.
Set valve to specifications. Check O-rings and
clean valve. Repair or replace valve as required.
Clean valve. Check O-rings on valve. Check
operation of valve. Repair or replace valve as
required.
Clean valve. Check O-rings on valve. Check
operation of valve. Repair or replace valve as
required.
Clean valve. Check O-rings on valve. Check
operation of valve. Repair or replace valve as
required.
Clean valve. Check operation of valve. Repair or
replace valve as required.
Clean valve. Check O-rings on valve. Check
operation of valve. Repair or replace valve as
required.
Clean valve. Check O-rings on valve. Check
operation of valve. Repair or replace valve as
required.
Clean valve. Check O-rings on valve. Check
operation of valve. Repair or replace valve as
required.
Hydraulic System
SJ85 AJ
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