Dover TWG 250PR Service- und Reparaturhandbuch - Seite 14
Blättern Sie online oder laden Sie pdf Service- und Reparaturhandbuch für Industrielle Ausrüstung Dover TWG 250PR herunter. Dover TWG 250PR 19 Seiten.
Seite drucken
GEARBOX BRAKE WON'T HOLD
Possible Solutions:
1. The brake discs and or stator plates are worn. Friction discs should measure no less than
0.075 inches thick and the stator plates should measure at least 0.045 inches thick and
replace as necessary
2. Broken dowel pins in brake piston
3. Mechanical failure. Evaluate all parts that transmit torque to ensure structural integrity and
replace any parts that show signs of damage or excessive wear
4. Weak or damaged brake springs. Free length of springs should be 1.000"
GEARBOX UNABLE TO ROTATE
Possible Solutions:
1. Motor failure. Remove motor and rotate both directions verifying pressure rotating in both
directions is appropriate.
2. Gearing Failure. See page 13 for servicing the planetary gear sets
3. One of the counterbalance valve cartridges may have a plugged metering
.
hole
Remove the counterbalance cartridge valves and inspect/clean metering holes
Le to lower load
OIL LEAKS FROM VENT
Possible Solutions:
1. The brake piston O-rings may have failed. Service the brake section and replace any worn
or damaged parts and O-rings found
2. Hydraulic motor shaft seal failure. Return to an authorized dealer for service
3. Gearbox is overfilled with oil. Maintain proper oil amount
4. Brake oil seal failure. Inspect and replace oil seal
TROUBLESHOOTING
(Item 34).
Check and replace if necessary
14