TM 5-2420-230-24-1
Spicer Speciality Axle Division - Technical Publications
OVERHAUL INSTRUCTIONS FOR TYPE 1S STEER DRIVE HUB
(WITH KIRKSTALL 151/2" x 6" BRAKE)
SECTION 1
DRAINING THE HUB OIL
1.1
Before attempting to remove road wheels, drive vehicle onto a level, solid concrete floor; preferably after
a short run to warm up the oil.
1.2
Chock wheels that are left on ground and apply parking brake.
1.3
With road wheels still on ground, loosen wheel nuts (1)
1.4
Jack up vehicle and support with axle stands.
1.5
Remove wheel nuts (1) then pull off road wheels (care must be taken during this operation)
1.6
Rotate to bring planet drain setscrew (66) to its lowest point.
Place a suitable drip tray under axle hub (approximate capacity 2 1/2 pts, 1.5 litres)
1.7
1.8
Remove planet level plug (68) and its washer (67)
1.9
Remove drain setscrew (66) and washer (65) to drain oil from hub.
1.10
When hub is empty, remove drip tray and dispose of old oil.
1.11
Similarly, place a drip tray under drive head (approx. capacity 14 pints, 8 litres) then remove filler and
drain plugs to empty axle of oil.
SECTION 2
DISMANTLING PLANET CARRIER UNIT
2.1
Remove planet carrier setscrews (66) and washers (65)
2.2
Screw two of planet carrier setscrews (66) into tapped holes provided in planet carrier flange (6) and
tighten evenly to extract planet carrier assembly from hub.
2.3
Remove and discard planet carrier 'O' ring (64).
2.4
Inspect planet carrier dowels (15) for signs of wear and / or damage and if replacement is necessary,
drive out towards inboard side.
2.5
Remove planet pin / collar setscrews (3), then ease out planet pin collar (4) and 'O' ring (5).
2.6
Support planet carrier assembly, inner face down, on blocks then knock out planet pins (63).
2.7
Planet wheels (10), thrust washers (6 & 11), needle rollers (8 & 10), and spacer (9) can then be lifted
from planet carrier (6).
2.8
Remove plug (69) from planet carrier (6)
INSPECTION
Inspect all dismantled parts for wear and / or damage, replacing where required, paying particular
attention to check for scoring on planet pin (63), pitting on needle roller bearings (8 & 10) excessive
scoring and wear on planet wheels (10) and for stress cracks / damage to planet carrier (6).
Spicer Speciality Axle Division
Page No.B3
Manual No. 1785 Issue B
A
J-33
