H Y D R A U L I C F E E D M A I N T E N A N C E
HydraulicFeedMaintenance
Contactyourdealeror
factoryservice
departmentBefore
servicingorrepairing anyofthehydrostatic feedcomponents(pump, motor,and/orrelief valve).Warrantyon theseitemsmaybevoid withoutprior authorization.
NOTE: Check the reservoir daily for proper fluid level, the presence of water (noted by a cloudy to milky appearance or free water in bottom of reservoir), and rancid fluid odor (excessive heat).
The hydrostatic pump normally does not require regular fluid changes. Change the system filter at 250 hour or annual intervals. Change the fluid and filter and clean the system if the fluid becomes contaminated with foreign matter (water, dirt, grease, etc.) or if the fluid has been subjected to temperature levels greater than the recommended maximum.
There is a greaseable bearing on each side of the main jack shaft on the main hydraulic feed housing. Grease periodically.
HydrostaticPumpTroubleshooting
Symptom | Probable Cause | SuggestedRemedy |
|
|
|
Willnotattainnormalfeedrate. | Engine not operating at | Repair engine governor. |
| correct speed. |
|
| Control linkage damaged or | Repair control linkage. |
| binding. |
|
| Bypass valve stuck partially | Repair bypass valve. |
|
| |
| open. (Problem in one | Removeforeignmaterialfrom |
| direction only.) | |
| valve. | |
|
| |
|
|
|
Willnotfeedwhencontrolarm | Control linkage damaged or | Repair or reconnect control |
ismoved. | notconnected. | linkage. |
| Drive between engine and | Repair drive (replace broken |
| pumpdamaged. | belt, repair sheared key, re- |
|
| pair splined coupling, etc.). |
| Pump low on fluid. | Refill reservoir. Purge air from |
|
| transmission. |
|
|
|
Feed rate is sluggish under | Loose drive belt between | Tension drive belt (replace if |
load. | engineandpump. | necessary). |
| Pump low on fluid. | Refill reservoir. Purge air from |
|
| transmission if necessary. |
| Large amount of water in hy- | Drain fluid from reservoir and |
| draulicfluid(evaporateswhen | unit, replace filter element, |
| hot, resulting in low fluid level). | and refill with new fluid. |
|
|
|
Hydraulic Feed will not pull in | Hydraulicsystemoverloading | Check relief pressure in sys- |
logs over 4" in diameter, or | and causing system to go | tem with a pressure gauge |
continuously stalls or stops. | over relief | ratedto2500psi.(Systemset |
|
| by factory at 1750 psi.) |
|
|
|
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