MASSEY FERGUSON 5400 - General; Operation

Massey Ferguson 5400 - Issue 1.a
05J01.3
GBA20 Creeper unit
A . General
The creeper gear reduction unit consists of an epicyclic
gear train with a planet carrier and ring gear assembly
mounted to the rear of the main gearbox. This unit is
controlled by a lever located on the cab console and
linked by a cable to an guide rod link mounted to the
front right-hand side of the centre housing. This link
moves the coupler control fork.
I
MPORTANT: Creeper gears shall only be selected if the
main gearbox is in the Tortoise range.
B . Operation
The coupler (8) is splined to the connecting shaft (21).
Movement of lever "A" to Snail position (Fig. 4) moves
the coupler (8) backwards and firmly joins it to the
planet carrier (1) via its external teeth. The speed of the
shaft (21) is 1/4 in relation to the output shaft.
In normal gears, the gearbox output shaft is secured to
the link shaft (21) when the coupler (8) is moved
forward, thus ensuring direct drive.
When the creeper gear range is selected, the Snail
indicator light is lit on the instrument panel.
When the Hare range indicator light flashes, the engine
is in Hare position and must be shifted to Tortoise posi-
tion.
The electrical signal corresponding to selection of the
creeper range is sent via switch "C" fitted on the
control unit (Fig. 4).
Parts list (Fig. 1)
(1) Planet carrier
(2) Friction washer
(3) Closing plate
(4) Grower washer
(5) Screw
(6) Snap ring
(7) Coupler ring
(8) Sleeve
(9) Pinion gear
(10) Needle bearings
(11) Spacer
(12) Pin
(13) Plate
(14) Plate
(15) Stop plate
(16) Circlip
(17) Planet carrier assembly
(18) Friction washer
(19) Ring gear
(20) Locating pin
(21) Link shaft
Overall view
Fig. 1