MASSEY FERGUSON 5400 - General

Massey Ferguson 5400 - Issue 1.a
06B01.3
GPA20 Normal 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-lipped 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 Normal Duty planet carriers have a single row of
needles (16). The internal surfaces of the planet carrier
(10) are rough cast and therefore require adjustment
using friction shims (13). Shims (25) placed at the end
of the shaft allow for preloading of taper roller bear-
ings. Axle shaft (2) and planet carrier (10) are held in
place by the washer (24) and screw (23). The final drive
ring gear (21) is force fitted into the trumpet and held
in place via three screws (16). It has three pins (20)
ensuring centring of the brake plate (17).
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) Lug stud
(2) Axle shaft
(3) Three-lipped seal
(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) Needle bearings
(16) Screw
(17) Brake plate
(18) Brake disc
(19) Screw
(20) Pin
(21) Final drive ring gear
(22) Sun gear
(23) Screw
(24) Washer
(25) Shim(s)
(26) Pin
(27) Plug