12 308–044
Service
WARNING
PRESSURIZED EQUIPMENT HAZARD
To reduce the risk of serious injury, follow the
Pressure Relief Procedure
on page 6 before you
check or service any system equipment and when-
ever you are instructed to relieve pressure.
Air and Fluid Fitting Replacement
When replacing the fluid fitting (4a), be sure to reinstall
the gasket and washer included with the fitting (gasket
and washer are not sold separately). Apply Loctite
r
242 sealant or equivalent on the fluid fitting threads
and torque the fitting to 20 ft-lb (27 N
S
m).
When replacing the air fitting(s) (4b), apply Loctite
r
PST pipe sealant or equivalent on the threads before
installing the new fitting.
Piston Service
When the air valve is closed, only a small, almost
imperceptible, amount of air should pass around the air
valve. If an excessive amount of air is passing through
the air valve, service the valve as instructed below;
refer to Fig. 3.
1.
Relieve the pressure.
2. Unscrew and remove the fluid needle guide (8).
3. Carefully pull the fluid needle (1) out of the piston
(12).
4. Clean and inspect the fluid needle (1), spring (7),
piston (12), and piston packings (13, 15) for dam-
age or wear. Replace if needed.
5. Apply a few drops of lightweight machine oil to the
fluid needle and reassemble the parts.
Fluid Packing Replacement
If fluid leakage cannot be stopped by tightening the
packing nuts (9), replace the fluid packings (10, 16).
Service as instructed below; refer to Fig. 3.
1.
Relieve the pressure.
2. Unscrew and remove the fluid needle guide (8).
3. Carefully pull the fluid needle (1) out of the piston
(12).
4. Unscrew the packing nuts (9) and remove the
packings (10, 16); use a pick if needed. Remove
the shield (24).
5. Clean and inspect the fluid needle (1); replace the
needle if damaged or worn.
6. Reinstall the fluid needle (1) through the piston
(12) and the rear packing cavity.
7. Slide the four front packings (10) onto the fluid
needle in the order shown in
Packing Detail 10
and push the packings into the gun cavity. Pull out
the needle and thread in the front packing nut (9).
8. Slide the rear packings (16) onto the fluid needle;
Orientate the packings as shown in
Packing
Detail 16
and push the packings into the gun
cavity. Thread in the rear packing nut (9).
9. Slide the fluid needle (1) into the front fluid packing
cavity.
10. Push the fluid needle (1) and piston (12) fully
forward.
11. Screw in both packing nuts (9) until the packings
(10, 16) are fully compressed, then back off the
nuts until the fluid needle moves freely. Install the
shield (24).
NOTE:
For the best fluid packing life, lubricate the gun
daily as explained in
Maintenance
.
Summary of Contents for H.E.L.P. 1600
Page 9: ...308 044 9 Notes...
Page 15: ...308 044 15 Notes...
