
17
SERVICE
PRIOR TO DISASSEMBLY
Note:
For orientation of parts in the following procedures,
refer to the parts drawing later in this manual
1. Clean the exterior of the tool and place on a clean work
surface.
2. Obtain the seal kit listed on the PARTS LIST so all seals
exposed during disassembly can be replaced.
PRIOR TO REASSEMBLY
1. Clean all parts with a degreasing solution.
2. Blow dry all parts or use lint-free cloths.
3. Ensure that all seals exposed during disassembly are
replaced with new parts.
4. Apply clean grease or o-ring lubricant to all parts during
assembly.
IMPACT MECHANISM DISASSEMBLY
1. Clamp the impact drill/wrench in a vice with soft jaws,
impact mechanism facing up.
2. Unscrew and remove the fasteners (8), lockwashers
(22) and lift the hammer case (61) off of the main housing
(80). If the tool contains a trigger guard (85), unscrew and
remove the fastener (23), nut (20) and remove the trigger
guard before lifting off the hammer case.
3. If the hammer frame (53) and hammers (54) remain on
the main housing, lift them off. If the hammer frame and
hammers remain in the hammer case, remove them by
turning the anvil until they drop out. On models containing
the 1/2 inch drive anvil, the hammer frame, hammers, and
anvil can be removed from the hammer case by simply
pushing on the anvil (55).
4. Push the hammer pins (52) out of the hammer frame and
then remove the two hammers.
5. To remove a 7/16 inch anvil from the hammer case,
complete the following steps.
a. Using two small screw drivers, push the thrust ring (57)
down and pry out the thrust ring lock (58). Lift off the thrust
ring, spring (56), and retaining sleeve (59) being careful to
not allow the steel balls (27) to fall out.
b. Remove the steel balls.
c. Push the anvil out of the hammer case.
IMPACT MECHANISM REASSEMBLY
1. Thoroughly clean and inspect all parts of the impact
mechanism. If the hammer case, hammers, pins, or anvil
appears damaged in any way, the part(s) should be re-
placed.
2. Apply grease and install a new o-ring (10) onto the pilot
ring (62). For underwater models, apply grease and install
a new o-ring (1) into the groove in the bushing (60).
3. Apply impact tool lubricant to the anvil and install it into
the hammer case. If the anvil is a 7/16 inch quick change,
complete the following steps.
a. Apply grease to the holes in the anvil for the steel balls
(27) and then install each ball.
b. Place the retaining sleeve (59) over the anvil followed by
the spring (56) and thrust ring (57).
c. Push down on the thrust ring and then install the thrust
ring lock (58).
4. Apply impact tool grease to the hammers, hammer
frame, and pins.
NOTE:
Do not fill the hammer case with grease or heavily coat
the mechanism parts with grease. A coating is all that
is required.
5. Install the hammers into the hammer frame and then
install each pin.
NOTE:
Make sure the hammers are oriented as shown in the
parts illustration (one hammer appears to be upside
down against the other). The order (front to back) does
not matter as long as one is upside down against the
other.
6. Install the hammer frame and hammers assembly into
the hammer case. Turning of the anvil will help seat the
frame and hammers.
7. Making sure the spacer (47) and bearing (32 & 33) are
in place, install the completed mechanism assembly to the
main housing and secure with the capscrews (8) and lock
washers (22). Tighten to 48 in. lb./5.4 Nm. If a trigger guard
is used, install it at this time.