Page 6
© ITW Inc 2007
about 100ml (4 fluid oz) of solvent into
the air intake port of the motor. Rotate
the motor by hand in both directions for a
few minutes.
8. Re-connect the airline and cover the
exhaust port with a cloth. Apply low
pressure 0.7bar (10psi) and re-start the
motor. Run until no more traces of
solvent can be seen.
9. The motor should be running smoothly. If
not, then a re-build may be required (see
QS-4016 Replacement of Parts).
REPLACEMENT OF
PARTS
QS-5012-CE Replacement of parts
(see Figs 5 & 6)
Before attempting any MAINTENANCE of
agitators on pressure feed tanks, the tanks
must be relieve of pressure as stated
previously.
1. Turn off and disconnect the mains air
supply hose with the air adjusting valve
(65).
2. Loosen the upper clamp screw (61) and
remove the air motor and gearbox
assembly.
3. Separate the motor and gearbox by
loosening locking screw (91).
4. Remove the spacer (94) and key (95)
from the motor shaft.
5. For the Air motor refer to QS-4016 Air
motor section.
Gear box
1. Remove the oil fill plug (88) or cover
plate (84) and drain gear box lubricant.
2. Disassemble the gearbox by removing
the cover (84), withdraw the gear shaft
(86) and washer (85).
3. Withdraw the worm gear (93) .
4. Inspect the seal (90) for signs of wear,
leaks or damage. Only remove if it needs
replacing.
5. Clean the seal housing and remove any
burrs or contaminants. These could
distort the new seal during fitting.
6. Inspect the gear shaft assembly (86) for
wear grooves, burrs or contamination of
seal sealing area on the shaft diameter.
If the seal sealing area is damaged the
shaft must be replaced.
7. Inspect all other parts for signs of wear,
chipping or other damage. Replace
damaged or worn parts.
8. If the oil seal (90) is being replaced,
check the new seal carefully for damage
before installing. Use an arbour press to
press the seal in. Use a close fitting tool
to the casting bore diameter to avoid
damaging the seal. Make sure the seal
lip is towards the bottom of the bore.
Press in squarely into the bore to avoid
warping. Check that the seal is fully
seated in the bottom of the bore.
9. Reassemble gear box in the reverse
order. Use new gaskets (87 and 92).
When re-fitting the air motor, slide
spacer (94) and fit key (95) before
engaging the motor to the gearbox.
Apply thread locking compound to the
locking screws (91) and tighten to 6.8
Nm (60 lbins). Refill the gearbox with oil
(SAE 10) as per previous section.
QMS-431-CE, 433-CE and 434-CE
Agitator Replacement of parts (see
Fig. 7)
Before attempting any MAINTENANCE of
agitators on pressure feed tanks, the tanks
must be relieve of pressure as stated
previously.
1. Remove lid from pressure feed tank.
2. Remove paddles by loosening screw(s)
(31).
3. Unscrew retaining nut (20) and remove.
4. Hold the shaft (28), loosen set screw
(23) on the collar (22). The collar (22)
and washers (24) can now be removed.
5. The shaft can now be withdrawn from
the bearing housing (25). Be careful with
the shaft seal (27) as any burrs or dried
paint could damage the lip seal.
6. If the O ring (26) is to be replaced,
unscrew and remove the bearing
assembly (25).
7. Examine the Shaft seal (27A) for any
damage. If it needs replacement, prise
out the retaining clip (27B), then the seal
(27A). Take care not to damage the seat
in the bearing housing (25).
8. Check the size of the oilite bearings in
the housing (25) for wear. These are
15.6mm when new. Replace when the
size is 15.9mm (0.626”) or greater.
9. Take a new seal (27A) and apply a small
amount of water or oil to the outside to
lubricate the fitted O ring.
10. Place the seal in the housing (25) O ring
first with the grooves facing outwards.
Press the seal in making sure it is seated
fully in the housing.
11. Clean the O ring groove in the housing
(25) and make sure the seating surface
on the tank lid is clean. Place the O ring
(26) in the groove and lightly lubricate it
with water or light oil. Screw the housing
(25) into the lid and fully tighten with a
spanner.
12. Take the shaft (28) and insert the
paddle end into the top of the housing
(25) and feed through, taking care when
feeding through the Shaft seal (27A).
13. Hold the shaft (28) with the groove about
12mm from then top of the housing (25)
and slip thrust washer (24) then collar
(22) over the end. Align the set screw
(23) in the collar (22) with the groove
and tighten. Fit 2nd washer (24).
14. Screw on retainer nut (20) onto the
bearing housing (25) and tighten with a
spanner.
15. Slide paddle(s) (29) over the shaft and
position as shown in Fig. 2 in the
installation section.
16. Re-fit the drive motor QS-5012-CE as
per installation section.
QMS-430-CE and
PT-428-CE/PT-419-CE
Replacement of parts (Figs 8 & 9)
Before attempting any MAINTENANCE of
agitators on pressure feed tanks, the tanks
must be relieve of pressure as stated
previously.
1. Turn off air supply with the air adjusting
valve (21) and disconnect the main air
supply hose.
2. Remove Lid from pressure feed tank.
3. Remove propeller (55).
4. Loosen screws (49) and remove retainer
(32A), Shaft (54) with the propeller (55).
5. Loosen screws (34A) or (49) and Air
motor (33) or (35) can be withdrawn from
the housing (34) or (48).
6. For replacement of parts procedure for
the Air motor see section for QS-4016
below. Some of the references are
different but the procedure is the same.
7. Examine the Seal (50) for damage or
wear. Only remove if it needs replacing.
8. Take a new seal (50A) and apply a small
amount of water or oil to the outside to
lubricate the fitted O ring.
9. Place the seal in the housing (34) O ring
first with the grooves facing outwards.
Press the seal in making sure it is seated
fully in the housing.
10.
Replace the Air motor and shaft
assembly in reverse order.
QS-4016 Air Motor Replacement of
parts (for QS-5012-CE)
1. Remove the end cap (36) or (64) for
QMS-430-CE.
2. Remove dead end plate bolts (39).
3. Remove dead end plate (40). Use a
puller, do not use screwdriver to remove
the end plate.)
4. Remove the dowel pins (42) from the
body and push back into end plate (40)
until flush or just below the machined
surface of the dead end plate. Remove
rotor (45) using an arbor press.
5. Remove
vanes
(44).
6. Remove shaft seal (47) and bearing (38)
or (69) from drive end plate (46) and
bearing (38) from dead end plate (40).
Do Not remove drive end plate bolts or
drive end plate (46).
7. Clean parts. Check for scoring on the
