910193 - Hydraulic Impact Wrench
Phone: (262) 637-9681
4.2021 Rev 2.1
Page
17
of
30
Before Disassembling
1. Clean the exterior of the tool.
2. Obtain impact grease.
3. Obtain a seal kit for this impact wrench so all seals exposed during disassembly can be
replaced
during re-assembly.
Impact Mechanism Removal, Cleaning and Installation
See Impact Mechanism Assembly Drawing on page 24.
Removal
1. Remove the four 5/16 – 18 X 1 1/2” socket head caps crews (57) and lock washers (56) securing the
hammer case assembly (48) to the main body assembly.
2. Hold the wrench with the impact mechanism pointing down.
3. Press the trigger while pulling the hammer case, gasket and impact mechanism away from the
housing assembly.
4. Remove the thrust bearing (40) and two thrust races (39), if they were not removed with the impact
mechanism.
5. Turn the hammer case anvil up. The impact mechanism components will drop into your hand.
6. Remove the two hammer pins (51) from the hammer frame (52).
7. The hammer (53) and anvil (50) can be removed at this time.
Installation
See Impact Mechanism Assembly Drawing on page 24.
1. Thoroughly clean all parts of the mechanism.
2. Using the correct impact grease lubricate the inside of the hammer frame and install the hammer,
anvil and two hammer pins.
The inside of the hammer case should be free of grease to avoid over-lubrication.
3. Lubricate the hammer case bushing and slide onto the anvil.
4. Grease the thrust bearing and thrust races.
5. Install the thrust race, thrust bearing and remaining thrust race on the main shaft in this order.
6. Install a new hammer case O-ring (12).
7. Slide the hammer case assembly (48) onto the anvil (50) and secure with 4 5/16 – 18 X 1 1/2” socket
head cap screws (57) and lock washers (56).
Tighten to a torque of 13-15 lbf-ft [17.6-20.3 Nm].
