Troubleshooting Guide - Macnaught Powerlube Bedienungsanleitung

15) Pull out primer (42) and piston rod assembly (13) from the
base (21). Use this rod assembly to push the washer (44), Seal
(45), and cylinder (46) out of the high pressure suction tube (43).
16) Remove gland nut (17), bottom (short) poppet valve assembly
(27) and o'ring (1), (3) from the cylinder base (21).
17) Use the primer / piston rod assembly to push piston rod seal
(18) from cylinder base (21).
18) Remove the 2 roll pins (38) with a pin punch. Unscrew the
primer / piston rod assembly and remove steel balls (39) and suc-
tion spring (41).
PUMP RE-ASSEMBLY
1) Ensure all parts have correct orientation. Check the parts dia-
gram for the correct orientation.
TROUBLE SHOOTING GUIDE
PROBLEM
1) Air motor runs but does not pump grease
2) Air motor runs slower than normal
3) Air motor cycles intermittently when not
using the pump
4) Grease leaks out of the seal condition hole
5) Gun leaks continuously out of the coupler
6) Air leaks continuously from the valve body
cover
7) Air motor does not operate, but will cycle
when the reset button is pressed
8) Air motor does not operate or cycle when
the reset button is pressed
CAUSE
a) The grease is too thick or too cold
b) The grease container is damaged
causing the follower to stop
a) The air pressure is too low
a) Grease leaking at hose (19) and or
swivel (86/87) connections
b) Grease leaks at B2 Gun coupler (68)
c) Grease leaks at the seal condition
hole
d) High pressure seal (45) worn or
damaged
a) Small quantity of grease indicates
seal lubrication is OK
b) Continuous 'worm' of grease indicates
the seal is worn or damaged
a) Incorrect trigger adjustment
b) Bent or damaged plunger
a) Replace worn air piston cup seals
(10) and / or piston (11)
a) The spool (34) is jammed in the valve
body (30)
b) Top poppet spring (4) is fatigued
a) Lower poppet spring (4) is fatigued
Note: Pump assembly is a reversal of disassembly procedure.
Note: Apply thread sealant (loctite or similar) to insert (23) and
primer rod (42) threads.
2) Fill strainer tube (530 with grease for initial prime. Hand tighten
suction tube (43), tube link (48) and strainer tube. Use the span-
ner flats on the strainer tube to tighten all three tubes.
3) Ensure that all o'rings, particularly in the valve body (30)and the
poppet valve (2), (27) areas, sit square.
4) Apply Light grease eg. petroleum jelly to the o'rings (24), (25)
and piston seals (10) before fitting the cylinder (7) to the cylinder
base (21).
a) Use NLGI no 2 or thinner grease. Store grease in
a warm place
b) Repair or replace container. Follower must be
able to move freely.
a) Increase air pressure, Minimum is 400 kPa/ 60
psi/ 4 bar, Maximum is 1000 kPa/ 150 psi/ 10 bar.
a) Check all connections. Use thread sealant and
tighten leaking connections.
b) See 'Problem 5' below
c) See 'Problem 4' below
d) Replace high pressure seal (45)
a) No action required
b) Replace Piston rod seal (18)
a) Adjust the trigger to allow 3 to 6mm free
movement
b) Replace plunger (60)
a) Replace cup seals and / or piston
a)
i) Push the reset button
ii) If the motor starts, disconnect the air line and
apply 3 or 4 drops of light oil to the air inlet of the
pump.
iii) If the motor does not start, follow 'Pump unit
disassembly' steps 1,2 and 4 through
iv) Replace spool (34) and clean valve bore.
v) When re-assembled, apply 3 or 4 drops of light
oil to the air inlet of the pump
b) Replace the top poppet spring
a) Replace the bottom poppet spring
REMEDY
3