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Section 4 – Troubleshooting Information
1. Stuck or defective platform level down valve 4H-
41.
2. Stuck or defective dual check valve DCV2.
3. Stuck or defective check valve CV7.
4. Stuck or defective shuttle valve SV3.
5. Stuck or defective relief valve RV3.
6. Stuck or defective counterbalance valve CB7.
7. Plugged orifice OR2.
8. Defective leveling cylinder C3 or slave cylinder
C4.
4.3-12 Brake will not Release
1. Stuck or defective shuttle valve SV5.
2. Defective or misadjusted pressure reducing valve
PR1.
3. Stuck or defective brake valve 3H-26.
4. Stuck or defective shuttle valve SV6.
5. Defective or misadjusted relief valve RV5.
6. Stuck or defective brake release override valve
V1.
7. Bypassing or defective brake hand pump V3.
8. Bypassing or defective brake cylinder BR1.
4.3-13 Brake will not Engage
1. Brake return spring or defective cylinder.
2. Brake valve 3H-26 stuck in shifted position.
3. Brake in axle out of adjustment.
229040ABA
154
Clean valve. Check operation of valve. Repair or
replace valve as required.
Clean valve. Check O-rings on valve. Check opera-
tion of valve. Repair or replace valve as required.
Clean valve. Check O-rings on valve. Check opera-
tion of valve. Repair or replace valve as required.
Clean valve. Check O-rings on valve. Check opera-
tion of valve. Repair or replace valve as required.
Set valve to specifications. Check O-rings and
clean valve. Repair or replace valve as required.
Clean valve. Check O-rings on valve. Repair or
replace valve as required.
Check orifice. Clean if plugged or replace if defec-
tive.
Check seals on cylinder. Replace as necessary.
Replace cylinder if defective.
Clean valve. Check O-rings on valve. Check opera-
tion of valve. Repair or replace valve as required.
Set valve to specifications. Check O-rings and
clean valve. Repair or replace valve as required.
Clean valve. Check O-rings on valve. Check opera-
tion of valve. Repair or replace valve as required.
Clean valve. Check O-rings on valve. Check opera-
tion of valve. Repair or replace valve as required.
Set valve to specifications. Check O-rings and
clean valve. Repair or replace valve as required.
Clean valve. Check O-rings on valve. Repair or
replace valve as required.
Clean valve. Check O-rings on valve. Repair or
replace valve as required.
Check seals on cylinder. Replace as necessary.
Replace cylinder if defective.
Check cylinder. Repair or replace as necessary.
Check valve. Replace if defective.
See section 5 for brake adjustment procedure.
Hydraulic System
SJ82 T, SJ86 T
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