VERDER VERDERAIR VA-E50 Manual page 16

Repair
Reassemble Reassemble the Reassemble the the Center Center Section Center
1. Clean and dry the center housing (101), the
center of the piston (102) and the drive shaft
(112).
2. Inspect the piston and center section bearings for
excessive wear and replace if needed. Grease
the piston as shown and install it in the center
section with the slot on the top, in line with the
alignment markings in the center section.
3. Install the o-ring (108) and apply medium-strength
(blue) thread locker to the bearing bolt (106)
and screw into the center section. Be sure that
the bearing (107) is in the slot on the piston, as
shown. Be sure that the piston moves freely.
Torque the bolt (106) to 20–34 N•m (15–25 ft-lb).
4. Be sure the sealing surface of the drive shaft
(112) is clean. Install the seal cartridge (110) and
the radial seal (111) on the drive shaft. The lips
on the radial seal (111) must face IN IN IN toward the
center. Inspect seal lip for damage. Replace
if necessary.
16
Section Section
5. Install o-ring (109) to the center housing (101).
6. Apply anti-seize lubricant on the mating edges of
the drive shaft, as shown in the illustration, page
18.
7. Center the piston in the housing and install
the drive shaft assembly (112) into the center
housing (101) with the groove facing up.
8. Inspect the shaft coupler (113) for wear and
replace if needed. Install on the drive shaft.
9. If removed, install the alignment housing to the
center section. Apply medium-strength (blue)
thread locker and install the housing screws
(117). Torque to 15–18 N•m (130–160 in-lb).
10. If removed, install the gearbox coupler (114)
on the gearbox (118) shaft. Use an M12 x 30
bolt and a large washer inserted into the hole in
the shaft to press the coupler into position. The
coupler is in proper position when it is flush with
the end of the shaft.
11. Be sure the gearbox coupler (114) is aligned
properly. Turn by hand if needed. Connect the
pump to the gearbox assembly, engaging the
couplers.
12. Apply medium-strength (blue) thread locker and
install the gearbox screws (120). Torque to
15–18 N•m (130–160 in-lb).
13. Be sure o-ring (127) is on the plug (124). Install
the plug and torque to 20–34 N•m (15–25 ft-lb).
14. See Reassemble the Diaphragms, page
Reassemble the Check Valve, page
14, and
11.
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