troubleshooting

Clogged outlet ports in pressure control valve adjusting cap Unclog the outlet ports

Air feeding in connecting hose through air bleed valve of pressure control valve is nil

Insufficient sinking of air bleed valve rod in pressure control valve. Pot the nut of connecting hose on outlet and tighten it Pressure control valve changes pneumatic compressor for idle stroke Decompress receiver tank to the value below 0.65 MPa

Ineffective operation of trailer brake

Brake valve actuator got out of adjustment Adjust brake valve actuator as indicated in clause 3.9.4.2 “Check and adjustment of single-line and double-line pneumatic system brake valves”

Brake valve failure Replace brake valve

Failure of trailer brake system Correct trouble in trailer brake system

Trailer brake are slowly released

Brake valve actuator got out of adjustment Adjust brake valve actuator as indicated in clause 3.9.4.2 “Check and adjustment of single-line and double-line pneumatic system brake valves”

Brake valve failure Replace brake valve

Failure of trailer brake system Correct trouble in trailer brake system ATTENTION: WHILE PNEUMATIC SYSTEM TROUBLESHOOTING ALL SELFMAINTAINED OPERATIONS RELATED TO PRESSURE CONTROL VALVE ADJUSTMENT AND REPAIR, ARE ALLOWED AFTER THE TRACTOR GUARANTEE PERIOD TERMINATION. OTHERWISE PRESSURE CONTROL VALVE WILL BE WITHDRAWN FROM AFTER-SALES SERVICE. TO REPAIR OR ADJUST YOUR PRESSURE CONTROL VALVE (INCLUDING MS3) DURING TRACTOR GUARANTEE PERIOD CONTACT YOUR DEALER!

7.10 Possible failures of transmission hydraulic system and guidelines for troubleshooting

List of possible failures in transmission hydraulic system and guidelines for troubleshooting are shown in Table 7.10. Table 7.10

Failure, external manifestations, cause Troubleshooting

Low oil pressure in transmission hydraulic system

Insufficient oil level in transmission Check oil level in transmission as indicated in section 6 “Maintenance service”. Refill oil up to the required level if necessary.

Clogging of distributor-filter bypass valve Rinse distributor-filter bypass valve

Clogging of full-flow mesh filter Rinse full-flow mesh filter Clogging of distributor-filter Remove cap and rinse distributor-filter Oil leakage through pressure-relief valve on pump actuator Replace pressure-relief valve Shrinkage of distributor-filter bypass valve spring

Adjust pressure by means of adjusting washers. If it is not possible replace the spring