Spicer Speciality Axle Division - Technical Publications
COMPLETE OVERHAUL OF DRIVE HEAD ASSEMBLY
DISMANTLING BEVEL PINION ASSEMBLY
Place a wedge between crownwheel and pinion teeth, to prevent movement, then, using a suitable pry
bar, carefully lever peened portion of coupling flange nut (1) to clear bevel pinion threads.
Loosen coupling flange nut (1).
Do not remove at this stage.
Remove bearing housing nuts (5) and washers (6).
Pull pinion housing (7) from gear casing (12). Lift off setting shims (8).
Remove any Loctite no.515 liquid gasket from between setting shims (8) also mating faces of pinion
housing and gear casing (7 & 12) using a suitable sealant remover such as Loctite Chisel Gasket
Remover or by carefully scraping sealant from faces.
With assembly resting on pinion face, remove coupling flange nut (1).
Using suitable extraction equipment, pull coupling flange (2) from pinion (58)
(E303 series equipment is available from our spares and service dept. if required ).
Pull pinion along with inner bearing cone (59A) and bearing spacers (60 & 61) from bearing housing (7).
Lift off spacer, then remove inner housing cone.
Prise out and discard oil seal (3) then lift out bearing cone (4A).
Using a soft metal drift, tap inner & outer bearing cups (59 & 4) from pinion housing (7).
DISMANTLING DIFFERENTIAL AND GEAR CASING ASSEMBLY
Mark diff. straps (19) to ensure correct re-assembly, remove diff. strap nuts (21) and washers (20).
Lift off straps, then remove and discard adjusting nut split pins (43).
Remove diff. bearing adjusting nuts (18 & 47) and lift out crownwheel and differential unit assembly.
Lift diff. bearing cups (17 & 46) off their cones (17A & 46A) and inspect for wear / damage.
Tap cones from register on diff. cage halves (14 & 50) if replacement is required.
Remove crownwheel nuts (16) and washers (15) then drive out crownwheel bolts (48) taking care not to
With a hide faced hammer, knock crownwheel (49) from its register on flanged diff. cage half (50) taking
care not to lose crownwheel dowels (45).
Scribe a line across joining faces of diff. cage halves (14 & 50) to ensure correct re-alignment on
The diff. cage halves can now be separated, enabling bevel wheels (52), thrust washers (51), along with
trunnion (53), diff. bevel pinion and bush assembly (54 & 55) and thrust washer (56) to be removed.
The bush (55) is a press fit in bevel pinion bore (54) and should be inspected for
wear / damage in situ.
Manual No. 1785 Issue A
© Spicer Speciality Axle Division