HG624 Issue 8 © 2017
2
Before carrying out any maintenance, disconnect the
air supply to the pump and release the fluid pressure
in the system by pressing the lever on the control gun.
Inspect your metered oil control gun daily for any signs of
damage. Replace any damaged parts or components as
required.
CONTROL HANDLE DISASSEMBLY
Use a clean bench to carry out maintenance.
A) Remove the oil delivery hose from the control gun inlet
swivel (14).
C) Carefully unscrew the valve cap (20), remove the valve
spring (19) and valve stem assembly (15,16,17) from
the gun body (8).
D) Remove the Gun Handle (9).
CONTROL HANDLE REASSEMBLY
A) Clean and inspect all parts for wear or damage.
Replace any suspect, worn or damaged components.
Note:
Lightly lubricate all o-rings and seals before
assembly.
B) If required, carefully place new o-rings (16,17,18) onto
valve stem (15).
Note:
o-ring (16) has a green dot and is different to the 2 o
-rings (17).
C) Re-fit the gun handle (9).
D) Carefully insert the valve stem assembly(15,16.17)
into the gun body (8).
E) Replace the valve spring (19), then replace the valve
cap.
Note:
Ensure the valve spring locates around the nipple on
the underside of the valve cap.
F) Replace the swivel assembly (14).
Note:
After assembly ensure the control gun handle
operating correctly.
MANUAL NOZZLE MAINTENANCE
1) Using a spanner and strap wrench, unscrew the nozzle
cap (1) from the nozzle body (6).
Note:
All the nozzle seals must be replaced if the nozzle
is disassembled.
2) Remove all the old seals from the nozzle body (6).
3) Inspect the nozzle cap (1) and nozzle body (6) for
damage. Replace if found to be damaged.
4) Replace all the nozzle seals (2,3,4,5).
5) Lightly lubricate the seals, then reassemble nozzle.
B) Unscrew and remove swivel (14) from the control gun
inlet.
2
3
1
4
6
5
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
PARTS DIAGRAM
