Troubleshooting Guide - B2 Gun
Problem
Booster fails to boost
Gun leaks continuously
from the coupler
Grease leaks past the
plunger
PA62 Issue 24 © 2017
Possible Cause
Contaminant under the non-
return valve body (5) ball seat.
Contaminant under the valve
sear in the inlet body (14).
Incorrect trigger setting.
Contaminant under ball (12) or
bent plunger (2)
Plunger O-Ring (4) damaged.
Note:
This product should be disposed of according to all applicable local
and national government environment regulations and guidelines.
For Warranty Terms and Conditions see macnaught.com.au
For a list of Australian Service Centres see macnaught.com.au
Remedy
Unscrew the extension tube (9) from the non-
return valve body (5).
Remove items 8,7,6 and 5. Clean all parts and
reassemble.
Unscrew the inlet body (14) from the gun body
(11). Unscrew the valve, insert (8). Remove the
valve spring (7) and steel ball (6). Clean the ball
seat and reassemble.
Loosen the locknut (1) and screw the plunger
adjusting screw (2) out until the trigger has free
play.
Unscrew the inlet body (14) from the gun body
(11).
Unscrew the extension tube (9) and swing the
trigger away, then remove the plunger guide bush
(1), plunger (2), backup washer (3) and plunger
o-ring (4).
This will enable the ball (12), ball support (16) ball
spring (13) and guide spring (15) to be removed
from the gun body (11).
Inspect, clean and replace all parts using a new
plunger guide bush (1).
Note: Apply teflon tape (or thread sealant) to the
extension tube (9).
Remove the extension tube (9), swing the trigger
(22) away, and remove the plunger guide bush (1)
plunger (2) backup washer (3) and plunger o-ring
(4).
Inspect, clean and replace all parts using a new
plunger o-ring (4) and plunger guide bush (1).
Note: Apply teflon tape (or thread sealant) to the
extension tube (9).
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