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17 bar - 5 bar and 1.5 bar valves - Open centre
F . Assembling the 5 bar valve
N
: It is not necessary to remove the left-hand
OTA
hydraulic cover to carry out work on the valve.
13. Remove the pipe and union.
14. Place the valve (1), spring (2) and threaded ring (3)
in the cover
(Fig.
8).
15. Compress the spring, tightening the threaded bush
until it reaches a "hard point"
reached the cover shoulder).
16. After assembly, check that free movement of the
valve and the compression of the spring, entering
a screwdriver through the port provided for
screwing in the temperature switch, located on the
lower part of the cover.
G . Description of the 1.5 bar lubrica-
ting valve
Location
The 1.5 bar valve (1) is hidden behind the fuel tank, and
is located at the front left-hand side of the gearbox
(Fig.
9).
Operation
It controls the oil coming from the cooling circuit, and
maintains a lubricating pressure of approximately 1.5
bar in the circuit, due to the valve setting. If the pres-
sure exceeds 1.5 bar, the spring (8) compresses, the
valve (2) moves and oil flows to the return R1
R
: For identification of pipes and hoses (see
EMINDER
§ A).
N
1: When the requirements of the low pressure
OTE
circuit are met, oil is channelled towards the booster
port of the brake master cylinders in order to ensure a
constant oil level.
N
2: Considering the available hydraulic options,
OTE
other assemblies can be carried out on the union (2)
(Fig.
9). Example: Front PTO - Meritor brake master
cylinders)
09H01.10
(Fig. 8
- the bush has
(Fig.
10).
Fig. 10
Massey Ferguson 5400 - Issue 1.a
Fig. 8
Fig. 9
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