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Adjusting the Needle
WARNING
INJECTION HAZARD
Proper adjustment of the needle is essential to be
sure the trigger safety latch makes the gun inop-
erative when engaged. Improper adjustment may
result in serious injury, including fluid injection and
splashing in the eyes or on the skin.
1. Tighten the seat (23) to 23 N ym (200 in-lb).
2. Install the needle and spring in the gun and hold
them in place with your thumb. See Fig. 4.
3. Check the travel of the trigger from the free posi-
tion to when it stops against the safety latch (15).
The travel should be about 8.1 mm (0.32 in.).
4. To adjust the travel, turn the two nuts (20 and 21)
toward the front (clockwise) to increase travel, or
toward the back to decrease travel.
5. Connect the hose.
6. Install the tip guard and prime the system.
7. Trigger the gun and release it. The fluid flow should
stop immediately. Now engage the safety latch and
try to trigger the gun. No fluid should flow. If the gun
fails either test, relieve the pressure, disconnect the
hose, and readjust the needle.
Gun Packings
1. Remove the trigger (14) and screws (1). See the
Parts Drawing on page 12.
2. Remove the packing nuts (13) on both sides of the
gun.
3. Remove the packings (10), glands (9† and 1) and
camshaft (12).
Service
24
23
0.32" (8.1 mm)
PRESS NEEDLE AGAINST SEAT TO CHECK TRAVEL
Fig. 4
CAM LEVER
Fig. 5
4. Soak the new leather packings (10*) in oil until
they are pliable, then install the packing, glands
(9† and 11†) and camshaft (12).
5. Install the packing nuts (13) and tighten snugly.
6. Install the trigger (14) and screws (1). If the cam-
shaft is too tight, loosen the spring retainer (19).
21
15
11
10
9
12
13
306–667
20
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