HW3 Impact Wrench
Greenlee Tools, Inc.
4455 Boeing Dr. • Rockford, IL 61109-2988 USA • 815-397-7070
7
Refer to the Illustrations and Parts List for correct orien-
tation and placement of parts.
Replace any O-rings, V-rings, seals, and gaskets on
parts that have been disassembled. Apply hydraulic
fluid or O-ring lubricant to all O-rings and all metal
surfaces which they must slide over. When installing
an O-ring which must slide over sharp surfaces, use a
rolling motion and be careful not to damage the O-ring.
Wherever the assembly results in metal-to-metal
contact, coat the surfaces with hydraulic fluid or O-ring
lubricant.
Handle and Head
1. Install ball (55), ball stop (54), and snap ring (53) on
the return port of the handle (5).
2. Install dowel pins (45), three O-rings (33), and O-ring
(60) onto handle (5). Install four screws (45) through
handle (5) and into head (1). Torque screws to 14.3
Nm (130 in-lb).
Note: Ensure O-rings stay in grooves when con-
necting handle to head. O-rings can be secured in
place with O-ring lubricant.
3. Install Cool Grip™ handle covers (49, 50) using
screws (52) and nuts (51). Nuts should be placed in
right cover (50). Torque screws until covers (49, 50)
fit snug.
Motor
1. Use an O-ring tool to install a new O-ring (3) from
the back end of the head (1).
2. Install spacer (40) onto drive shaft (8). Apply Mobilith
SHC™ PM 460 to thrust bearing (38) and work
the grease into needle rollers. Apply a light film of
grease to the thrust washers (39). Stack the thrust
washers and thrust bearing properly and place the
stack onto the drive shaft (8).
3. Lubricate drive shaft (8) and slide it into the head (1)
from the hammer case end.
4. Install Woodruff keys (9) onto the drive shaft. Align
the keyways in the gears (10) with the Woodruff
key on the drive shaft and install the gears onto the
drive shaft. Secure the gears with retaining ring (11).
5. Install the Woodruff key (9) into the idler shaft (13).
Align the keyway in the remaining gears (10) with the
key and install the gears onto the idler shaft. Install
the idler shaft with gear into the head, meshing the
two gears together. Secure the gear with retaining
ring (11).
6. Install dowel pins (14) into head. Install new O-ring
(15) onto motor cap (7) groove.
7. Install motor cap (7) onto head (1). Secure motor
cap with cap screws (16). Torque cap screws to
14.3 Nm (130 in-lb). Refer to “Torque Sequence”
below.
Assembly
Torque Sequence
1
3
2
5
6
4
Trigger, Trigger Spool, and Super Spool
1. Install new O-ring (33) onto Super Spool (30). Install
Super Spool (30) and secure with retaining ring (32)
in trigger spool (29).
2. Install new O-ring (69) onto trigger spool (29).
3. Install new O-ring (27) and backup ring (28) into
handle (5).
Note: Install the backup ring (28) first. Pull the
backup ring with a pick so that it is positioned in the
groove toward the back side of the tool. Then install
the O-ring (27) into the groove in the handle (5).
4. Slide trigger spool (29) into handle (5) from front end
of tool. Spool should bottom out onto handle covers
(49, 50).
Note: If handle covers (49, 50) are missing or
damaged, the trigger spool will need to be dead
stopped to prevent it from sliding out of the back
when spring (36) is installed.
5. Slide spring (36) and washer (34) onto spool (29)
inside handle (5). Secure spring and washer with
retaining ring (35).
6. Install pin (47) into trigger (37) through handle (5).
Install second pin (47) through trigger (37) and
trigger spool (29). Secure pins with retaining rings
(48).
