PREVOST GKN AXLES LIMITED KIRKSTALL DIVISION, Руководство по обслуживанию

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4
11. Check the condition of swivel stop nut
(33, Fig. 8), and adjusting washer (32,
Fig. 8), removing for replacement if
required.
4.1 Inspection
Thoroughly clean all parts, inspect for wear
and renew if required.
5. REFITTING STUB AXLE
ASSEMBLY
1. Prior to assembly, pack swivel pin bearing
(20/20A, Fig. 8) with lithium base grease
(Shell Retinax LX or equivalent) using a
bearing packer or manually knead grease
between rollers, race and cage.
2. Coat all internal surfaces / parts with
clean gear oil.
3. Fit swivel pin top oil seal (18, Fig. 8), open
side first, into position in top swivel bore
(58, Fig. 8).
4. Fit swivel pin bearing cup (20, Fig. 8) into
position in swivel bore (58, Fig. 8).
5. Press swivel pin bottom bush (57, Fig. 8)
into position in swivel bore (58, Fig. 8)
flush with bottom face of swivel.
6. Fit swivel bush seal (52, Fig. 8) onto the
protruding diameter of swivel pin bottom
bush (57, Fig. 8) then place dirt excluder
(78, Fig. 8) into position over seal.
7. Position swivel assembly onto axle beam
(37, Fig. 8).
Note:
Care must be taken during this
operation so as not to roll or trap swivel bush
seal (52, Fig. 8). Suggest a thin piece of card
or plastic places on seal during this
operation. Make sure that swivel pin bore is
free of burrs and corrosion, then grease bore
with multi purpose chassis grease.
1. Drive swivel pin (56, Fig. 8) through
swivel (58, Fig. 8) and axle beam (37, Fig.
8).
2. Lubricate swivel pin bearing sleeve (17,
Fig. 8) with clean oil / grease then fit over
protruding swivel pin (56, Fig. 8), large
chamfer first to locate in oil seal bore (18,
Fig. 8) and abut upright (37, Fig. 8).
3. Select swivel bearing adjustment shims
(19, Fig. 8) with total thickness of
approximately 0.020 inch and place in
position on top swivel bearing sleeve (37,
Fig. 8).
4. Fit swivel pin cone (20A, Fig. 8) into
swivel pin bearing cup (20, Fig. 8).
5. Fit swivel pin washer (21, Fig. 8) and
swivel pin nut (22, Fig. 8) then tighten nut
to 500-700 lbf•ft (678-949 N•m).
6. Using a 7/14 lb hammer, shock load axle
beam (37, Fig. 8) on forged end area.
6. SWIVEL BEARING
ADJUSTMENT
With nominal shim (19, Fig. 8) thickness of
0.020 inch placed between bearing (20/20A,
Fig. 8) and bearing sleeve (17, Fig. 8), attach
a cord and spring balance capable of reading
25 lbs (11,5 kg) to end of stub axle (58, Fig. 8)
as shown in figure 2. Pull swivel from lock
to lock, noting spring balance reading,
ignoring the force needed to start movement.
The correct reading should be between 12 to
24 lbs (5,5 to 11 kg) pull giving 10-20 lbf•ft
(13,6-27 N•m). If the reading is outside these
limits, it will be necessary to alter shim
thickness (19, Fig. 8) between bearing cone
(20A, Fig. 8) and its sleeve (17, Fig. 8).
To increase the load required, remove shims
from nominal pack.
To decrease the force required, add shims to
the nominal pack.
Add or subtract shims as required until a
reading of 10-20 lbf•ft (13,6-27 N•m) is
obtained.
When swivel is set correctly, check that swivel
pin nut (22, Fig. 8) is tightened to 500-700
lbf•ft (678-949 N•m) torque.