Graco Merkur Bellows, Repair Parts

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Repair
12 312793L
Reassemble Bellows and Chamber
1. Slide the bellows bushing (6) and new bellows (7)
on the connecting rod (14).
2. Install new o-rings (4 and 5) into snap bushing.
Grease and install snap bushing (3) on end of bel-
lows and snap into place.
3. Put the bellows o-ring (12) loosely around the bel-
lows (7). Push the connecting rod (14), with fully
assembled bellows (7) into the bellows chamber (1).
Hand tighten the connecting rod.
4. Hold the hex on the connecting rod (14) and use a
torque wrench to turn the piston (45). Torque to
74-86 ft-lb (100-117 N•m).
5. Make sure the o-ring (12) is against the top of the
bellows. Push the connecting rod (14) and bellows
(7) snugly into the bellows chamber (1).
6. Set top cap (8) on the connecting rod (14). Do not
tighten.
7. If Replacing Overflow Chamber: Order Kit
24E298. (See page 25.) Install the new D-shaped
seal (106) on the connecting rod (14). Hold connect-
ing rod with 19 mm (3/4 in.) wrench. Install and
tighten the retaining nut (105). Torque to 100-120
in-lb (11-14 N•m). Do not overtighten.
8. Install a new foot cap o-ring (41). Grease and install
the foot cap (42). Torque to 54-66 ft-lb (73-89 N•m).
9. Push up on the motor shaft. Slide on the coupling
nut (55). Install the coupling collars (56).
10. Hold connecting rod with 19 mm (3/4 in.) wrench.
Install and tighten the coupling nut. Torque to 75-80
ft-lb (138-146 N•m).
11. If Replacing Overflow Chamber: Insert the o-ring
(102) into the lid (101). Tighten the new bottle (103)
with lid (101) attached, to the fitting (104).
12. Turn connecting rod (14) to align holes in top cap (8)
with holes on bellows chamber (1) so the D-flat in
the top cap faces the front of the pump. Reattach
the top cap (8) and shield mount spacer (9). Torque
screws (10) to 100-120 in-lb (11-14 N•m).
F
IG
. 6. Replace bellows.
8
9
10
42
14
45
7
1
ti14533a
41
3
4
5
6
Apply thread lubricant.
2
Torque to 100-120 in-lb (11-14 N•m).
3
3
Torque to 74-86 ft-lb (100-117 N•m).
5
2 5
Apply grease.
1
1
1
1
Torque to 54-66 ft-lb (73-89 N•m).
4
2 4
12
1