MASSEY FERGUSON 5400 - General

Massey Ferguson 5400 - Issue 1.a
06B02.3
GPA20 Heavy Duty Trumpet housings
A . General
Description
The trumpet housings support the right- and left-hand
side axle shafts and contain the final drive units that
transmit the rotation from the differential assembly.
Both trumpet housings are symmetrical and fitted on
either side of the centre housing.
Construction
The axle shaft (2) is supported by two opposing taper
roller bearings (5) (8). External tightness is ensured via
a three-lip seal (3) and internal tightness by a single-lip
seal (7). The three-pinion final drive unit (14) planet
carrier assembly (10) is integral in rotation with the
shaft (2) via splines.
The reinforced Heavy Duty planet carriers have a
double row of needles (16). The internal surfaces of
the planet carrier (10) are rough cast and therefore
require adjustment using friction shims (13). Shims
(26) placed at the end of the shaft allow for preloading
of taper roller bearings. The axle shaft (2) and planet
carrier (10) are held in place by the washer (25) and
screw (24). The final drive ring gear (22) is force fitted
into the trumpet and held in place via three screws
(17). It has three pins (21) ensuring centring of the
brake plate (18).
Differential rotation is transmitted to the pinion gears
of the drive unit via a sun gear shaft (22) on the teeth
of which the brake disc (18) is placed.
The brake discs are lubricated by a continuous flow of
oil from the lift control valve (see section 9).
Parts list
(1) Wheel stud
(2) Axle shaft
(3) Three-lipped seals
(4) Seal cage
(5) Bearing cup
(5A) Bearing cone
(6) Trumpet housing
(7) Seal
(8) Bearing cup
(8A) Bearing cone
(9) Tab washer
(10) Planet carrier
(11) Snap ring
(12) Pinion gear pin
(13) Friction shim(s)
(14) Pinion gear
(15) Spacer
(16) Needle bearings
(17) Screw
(18) Brake plate
(19) Brake disc
(20) Screw
(21) Pin
(22) Final drive ring gear
(23) Sun gear
(24) Screw
(25) Washer
(26) Shim(s)
(27) Pin
(28) Plug