MASSEY FERGUSON 5400 - Page 148

Massey Ferguson 5400 - Issue 1.a
05E02.10
Selector cover - GBA20 with Power Shuttle
Identification and function of
Hare/Tortoise range locking elements
Toggle (34)
This is one of the main elements of the Hare/Tortoise
range locking system. It runs free on pin A (Fig. 3) and
pivots with it by means of a flat section.
Function
- It moves the plunger (31) towards the indexing pin
(35) and locks it during gear engagement
- Using its other face it controls the Neutral position of
pin A (gear shift lever) by means of a switch (28).
Indexing pin (35)
At one end there are two different locking grooves:
- the narrow groove: Hare position,
- the wide groove: Tortoise position.
The other end is designed to house the stop of the
Hare/Tortoise fork.
Function
It avoids any unwanted reverse movement of the
Hare/Tortoise fork in case of electronic or hydraulic
malfunction.
Plunger (31)
Spherically shaped at each end, it moves between
toggle (34) and indexing pin (35).
Function
It acts as the system lock, whatever range is engaged.
Switch (28)
It is controlled by a toggle.
Function
It informs the tractor electronic system when the gear
shift lever is in Neutral position.