HW3 Impact Wrench
Greenlee Tools, Inc.
4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
6
Disassembly
(cont’d)
Reversing Spool
1. Remove cap (23) and pull reversing spool (17) out of
right side of tool.
Note: Attempting to push the reversing spool the
opposite way through the bore will damage the
O-rings and could allow particles of O-ring to get
into the motor.
2. Remove O-ring (27) and backup ring (28) from
head (1).
3. Remove O-ring (24) and backup ring (25) from
spool (29).
Handle and Head
1. Remove plastic covers (50, 49) by removing screws
(52).
2. Remove screws (45) from handle (5) to separate
head (1) from handle.
3. Remove dowel pins (46) and O-rings (33, 60).
4. Remove snap ring (53), ball stop (54), and ball (55).
Flow Control
1. Remove piston stop (63) from handle (5).
2. Remove O-ring (61) and backup ring (62) from
piston stop (63).
3. Remove plug (66), spring (65), and piston (64) from
handle (5).
Inspection
Clean all parts with solvent and dry them thoroughly.
Inspect each component as described in this section.
Replace any component that shows wear or damage.
1. Bearings: Insert shaft into bearing. Spin shaft.
If shaft does not spin smoothly, replace the entire
assembly with the bearings already pressed in.
2. Motor cap and handle: Inspect mating surfaces,
gear cavities, oil passageways, etc. for grooves or
nicks. If any component shows wear or damage,
replace the entire assembly with the bearings
already pressed in.
3. Thrust rings: Replace any thrust ring that is
out-of-round or has been sprung.
4. Bearing (inside hammer case cap): Slide the anvil
into the bearing. Spin the anvil. If the anvil does
not turn smoothly, inspect the bearing surface. If
the bearing surface shows uneven wear, replace
hammer case cap as an assembly with the bearing
already pressed in.
5. Thrust bearing and thrust washers: Spin the bearing
against the washers. If bearing does not spin
smoothly, replace the bearing and washers.
6. Inspect all other disassembled components for
cracks, grooves, or nicks.
