4.
Remove end cover taking care to not drop piston. Us-
MARKER LINE
ing needle nose pliers, lift piston (item 7) from end cover.
Remove and discard backup seal (item 5) and O–ring
seal (item 6) from piston.
5.
Remove piston spring (item 4) from end cover.
IMPORTANT: When removing commutator seal
(item 8), be careful not to scratch or damage com-
mutator assembly.
MARKER LINE
Figure 36
6.
Lift commutator assembly (item 9) from motor. Place
commutator on a flat, clean surface with the seal facing
up. Place the tip of a small screwdriver on the seal and
gently tap the seal until the opposite side of the seal lifts
from the groove in the commutator. Remove and discard
the commutator seal.
2
5
3
4
1
7.
wear plate (item 13) from motor. Make sure that rollers
do not drop from rotor as it is removed.
Lift manifold (item 10), rotor assembly (item 11) and
8.
and then thrust washer (item 16) from motor housing.
Remove drive link (item 12), thrust bearing (item 15)
9.
wards and remove from rear of housing.
From front of housing, gently tap shaft (item 19) up-
10.Remove
housing from vise and place on flat, clean
surface with dust seal facing up. Using a small thin
screwdriver, carefully pry dust seal (item 27) from the
seal carrier. Discard removed seal.
Figure 37
1.
2.
3.
Dust seal
Seal carrier
Metal backup shim
4.
5.
Backup seal
Shaft seal
11.
Using an arbor press and appropriate sleeve, press
the seal carrier (item 23) down into the housing approxi-
mately 0.250” (6.4 mm) to allow access to wire ring
groove in housing.
Assembly (Fig. 35)
1.
2.
Coat new seals with clean hydraulic oil.
Assemble seal components to seal carrier:
12.Using
a small thin screwdriver, carefully pry the wire
ring (item 26) from the housing groove. Then pry the
metal backup shim (item 25) and high pressure seal
(item 24) from the groove.
A. Install metal backup shim (item 22), backup seal
(item 21) and shaft seal (item 20) into seal carrier
(item 23) noting orientation shown in Figure 37.
13.Remove
the seal carrier from the housing. Carefully
pry the shaft seal (item 20), backup seal (item 21) and
metal backup shim (item 22) from the seal carrier. Dis-
card seals and shim.
B. Place seal side of carrier on flat surface and press
carrier down to seat seals in seal carrier.
C. Install dust seal (item 27) into seal carrier noting
orientation shown in Figure 37.
14.Remove
bearing (item 15) from housing.
two (2) thrust washers (item 16) and thrust
D. Make sure that dust seal and shaft seal are
coated with clean hydraulic oil to provide start–up lu-
brication.
CAUTION
3.
one thrust washer, the thrust bearing and then the sec-
ond thrust washer against the bearing in the housing.
With the flange side of the housing facing up, place
Use eye protection such as goggles when using
compressed air
4.
making sure that the large OD of the seal carrier faces
down.
Install the seal carrier assembly into the housing
15.Wash
air.
all parts in solvent. Dry parts with compressed
Topdresser 1800 & 2500
Page 3 – 41
Hydraulic System
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