Tommy Gate 650 Series Replacement Instructions

Power Unit, Motor, or Tank Replacement Instructions-
650 Series
The following instructions will aid you in replacing the power unit, motor, or tank on a 650 Series liftgate.
Removing the Power Unit
1. Raise and Store the platform in the latch.
2. Actuate the lowering function for five (5) seconds to relieve pressure in the system.
3. Disconnect the 4GA power cable from the positive side of the battery
or manually Trip the circuit breaker (Figure 2).
4. Remove the pump box cover by loosening four (4) hex head screws
or six (6) wing nuts (Figure 1).
5. Go to Replacing the Motor if replacing only the motor, otherwise proceed to next step.
6. Place a rag underneath the connection to absorb any
hydraulic oil that leaks when hose is loosened.
Caution: If the steps 7 and 8 are not performed properly, warranty will not be awarded for pulled threads.
7. Loosen elbow jam nut. While attempting to loosen the jam nut with an open end wrench,
hold the elbow in place using another open end wrench (Figure 3).
8. Disconnect hose to elbow connection. While attempting to loosen the hose with an open end wrench,
hold the elbow in place with another open end wrench (Figure 4).
9. Raise the disconnected hose end above the cylinder as soon as possible to minimize oil leakage.
10. Position the disconnected hose end in a location that is above the cylinder until hose is reconnected.
DPN: 095191
3
21- "
4
Figure 3: Jam nut.
Page 1 of 4
19"
(6) Wing Nut
(3 per side)
Figure 1: Pump box cover fastener locations.
Manual Disconnect
Button
Figure 2: Circuit breaker.
Wrench
Jam nut
(tight)
Elbow
Wrench
Figure 4: Hose connection.
Rev 1
(4) Hex Screw
(2 per side)
Circuit
Breaker
Jam nut (loose)
Elbow
Wrench
Hose Hex Fitting
1-5-16