PREVOST GKN AXLES LIMITED KIRKSTALL DIVISION, Руководство по обслуживанию

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2. ROUTINE MAINTENANCE
2.1 Hub Bearing Adjustment
An inspection should be made after the first
3,000 miles (4 800 km) and then at intervals
of 25,000 miles (40 000 km). With the wheels
raised they should revolve quite freely without
roughness.
Hub bearings should have a slight end float
movement within the limits 0.0005 to 0.002
inch when rocked forwards and backwards on
stub axle. See paragraph "8. HUB UNIT
ASSEMBLY" , if any adjustment is required.
Caution:
Hub oil fill cap is provided with
a very small vent hole. Occasionally insert
a small tip to avoid hole restriction, as it
prevents over pressure in bearing housing.
3. HUB UNIT REMOVAL
1. Chock the appropriate wheels.
2. Whilst road wheels are still on ground,
loosen wheel nuts slightly.
3. Raise vehicle, remove road wheel nuts
and remove road wheels.
4. Disconnect air line from brake caliper (13,
Fig. 8).
5. Remove brake caliper setscrews with
washers (15 & 16, Fig. 8) then lift off
brake caliper assembly (13, Fig. 8).
6. Drain the oil lubricated hub cap.
7. Remove hub cap setscrews and washers
(1 & 2, Fig. 8).
8. Remove hub cap (3, Fig. 8) with 'O' ring
(4, Fig. 8) then discard 'O' ring.
9. Remove hub bearing pinch bolt nut (5,
Fig. 8) and bolt (66, Fig. 8), then remove
hub bearing nut (67, Fig. 8) along with
hub bearing washer (6, Fig. 8).
10. Remove hub (8, Fig. 8) complete with its
bearings (11/11A & 64/64A, Fig. 8) and oil
seal (12, Fig. 8) then lift off outer bearing
cone (64A, Fig. 8).
11. Remove oil seal (12, Fig. 8) and inner
bearing cone (11A, Fig. 8) from hub (8,
Fig. 8).
12. Drive out hub bearing cups (11 & 64, Fig.
8) from hub (8, Fig. 8).
13. If hub bearing distance piece (oil seal
wear sleeve) (60, Fig. 8) shows signs of
wear or corrosion it must be removed and
replaced with a new part.
4. STUB AXLE ASSEMBLY
REMOVAL
1. Remove cotter pins and stud nuts which
attach tie rod socket ends to bell crank
and left steering arm (47, Fig. 8) or to idler
arm and right steering arm. Remove tie
rod ball stud by tapping on steering arm
and bell crank or idler arm with a
hammer, while using a heavy hammer as
a backing.
2. Remove swivel top cap setscrews and
washers (25 & 24, Fig. 8), enabling swivel
top cap (23, Fig. 8) to be removed.
3. Remove sealant from top cap and swivel
mating faces (23 & 58, Fig. 8) using
Loctite 'Chisel Gasket Remover' or by
carefully scraping sealant from faces.
4. Remove bottom cap setscrews and
washers (53 & 54, Fig. 8).
5. Pull off swivel bottom cap (55, Fig. 8) then
remove sealant from bottom cap and
swivel mating faces (55 & 58, Fig. 8)
using Loctite 'Chisel Gasket Remover' or
by carefully scraping sealant from faces.
6. Remove swivel pin nut and washer (22 &
21, Fig. 8).
7. Give axle beam (37, Fig. 8) a sharp tap to
loosen swivel pin (56, Fig. 8). The swivel
pin (56, Fig. 8) can then be driven out
downwards, thus releasing it from axle
beam.
8. The swivel assembly can be removed
from axle beam (56, Fig. 8).
9. Take out swivel pin bearing (20/20A, Fig.
8), swivel bearing adjustment shims (19,
Fig. 8), swivel bearing sleeve (17, Fig. 8)
and swivel pin oil seal (18, Fig. 8) from
top of swivel (58, Fig. 8).
10. Take out swivel bush seal (52, Fig. 8) and
swivel pin bush (57, Fig. 8) from bottom of
swivel (58, Fig. 8).