Troubleshooting

F-code Section C-code

PS M6.0 6000 Hydraulic System

Version no T-code

001

7. Troubleshooting

NOTE! Proper care and cleanliness should be observed in servicing to insure oil does not become contaminated with dirt or other foreign material. Contaminants can be drawn into pump so as to stick or score pump which will cause failure of pump assembly.

IF HYDRAULIC PUMP ASSEMBLY DOES NOT OPERATE PROPERLY, A FEW PRELIMINARY CHECKS SHOULD BE MADE:

1. Proper oil level 2. All electrical connections tight 3. Battery fully charged After the preliminary check is accomplished, install a 0-5000 PSI pressure gauge in the pressure line near the 3/8 in. NPTF outlet port in the adapter. The installation of a pressure gauge is required to insure proper observation of what is occurring in the unit during trouble shooting. Start pump and raise lift cylinder to its upper limit stops to develop maximum pressure of the unit, which will normally be passing all flow over a relief valve. Pressure gauge should be reading the set pressure of relief valve. Remove pressure on hydraulic system by actuating the solenoid operated lowering valve. Normal troubles that may occur with pump assembly have been grouped under three headings: Failure to (A) Raise (B) Hold (C) Lower load. One or more of the listed trouble sources may be causing improper operation. Refer to the proper heading (i.e. relief valve) for detailed instructions for disassembly, check and adjustment of parts to remedy the trouble.

A.If pump operates but will only develop low pressure or slow lift: 1.Relief valve seat scored, foreign particles under ball or relief valve out of adjustment (See relief valve). 2.Dirt in solenoid-operated release (See solenoid operated release valve). 3.Pump worn - replace pump.

F-code Section C-code

PS M6.0 6000 Hydraulic System

Version no T-code

001

B.If pump develops pressure but will not hold: 1.Dirt in solenoid-operated release (See solenoid operated release valve). 2.Relief valve seat scored, foreign particles under ball or relief valve out of adjustment (See relief valve). C.If pump develops pressure but will not release load: 1.No electrical contact to solenoid operated release valve (See solenoid operated release valve). 2.Solenoid in solenoid-operated release valve burned out. 3.Relief valve bottomed causing pressure to go beyond the unloading limit of the solenoid release valve (See relief valve).