Reassembly - Tennant ATLV 4300 Service Manual

Model 70160
Repair Information

Reassembly

1 Before reassembling the pump, replace all worn and
damaged parts, assemblies, seals and o-rings. Lubricate the
seals and o-rings with petroleum jelly to help retain them
during reassembly and to provide lubrication to the input and
control shaft seals. Lubricate all finished part surfaces freely
with clean hydraulic fluid to help provide start up lubrication
between all rotating parts.
2 To reassemble the camplate
assembly into the pump housing,
tilt the camplate slightly and install
the control side of the camplate
through the previously noted or
marked side of the housing
assembly (see Figure 36).
3 Lubricate the tapered bearing
and reassemble it on the non-
control arm side of the camplate
(see Figure 37).
4 Lubricate and install the o-ring
seal into counter-bore of housing
(see Figure 37).
5 Install the trunnion cover over
bearing and onto pump housing.
Install the three cap screws and
washers, torque screws to 39,3 Nm
[29 ft-lb] (see Figure 38).
6 Lubricate and install the
control arm shaft seal into the
control arm cover plate. Install with the lip of the seal facing
upward or to the inside of the pump (see Figure 39).
7 If the housing, trunnion covers or camplate assembly have
not been replaced, the existing crush ring may be re-used. If
you have replaced anyone of the above a shim kit must replace
the crush ring. See Parts Information manual for number.
8 Place the bearing cup into trunnion cover over the crush
ring or shims (see Figure 40).
Figure 39
- Reassembly
9 Lubricate and install the o-ring
seal into counter-bore of housing
(see Figure 41).
10 Install the trunnion cover over
the control shaft and into the pump
housing. Install the three retaining
cap screws and washers, torque
screws to 39,3 Nm [29 ft-lb] (see
Figure 36
Figure 42).
11 Using your fingers, tilt the
camplate back and forth to check
the trunnion bearing preload.
Proper preload is achieved when
the camplate has a very slight
tilting resistance. The camplate
must not have any or very little side
clearance.
12 Reassemble the input shaft
assembly by installing the thrust
washer, thrust bearing, second
thrust washer, retaining ring,
Figure 37
washer and shaft seal (see Figure
43).
Figure 38
Note: The lip of the shaft seal must
point toward the center of the input
shaft.
13 Install the input shaft
assembly into the housing
assembly. Push the shaft seal in
just far enough so you can start the
shaft seal retaining ring.
14 Use a pair of snap ring pliers
to install retaining snap ring into
the housing assembly (see Figure
44).
15 Use a seal driver or similar
tool to press or drive the snap ring and seal into the housing
assembly (see Figure 45).
CAUTION! Press or drive inward
Figure 40
until the snap ring snaps into the
snap ring groove located in the
pump housing assembly.
16 The thrust plate is reversible.
Either side will fit into the camplate.
In most cases if any irregularities
are noted it is best to replace the thrust plate (see Figure 46).
11
Figure 41
Figure 42
Figure 43
Figure 44
Figure 45
Figure 46