FOG QUADRA 493 9021 - VALVE CHECKS AND LUBRICATION; Ram Safety Valve Operation Test

E 167 - GB - 6
20
Rue du Pré Neuf - 58440 MYENNES FRANCE
QUADRA
493 9021
493 9031
Checking the ram safety valve
Should a hose fail, this valve stops the lift from lowering by locking up the fluid in the ram. Correct operation
of this valve is depends on the correct oil grade/viscosity, it should be checked whether the oil is of the
correct grade before carrying out this test. If it is too cold, fully raise the loaded platform a few times.
In order to check the valve setting:
• Place a FOUR Tonne load onto the platform and then raise it.
• Slowly move the ‘LOWER’ lever and mark its position as soon as the valve operates (about 3/4
of the way).
• Raise the platform again to its uppermost position.
• Move the ‘LOWER’ lever until it is brought slightly in front of the previously marked position so
that the valve is not made to function. Record the time it takes to lower the platform fully. This
should be between 23-26 secs.
• If it is necessary to adjust its setting, refer to Fig. 16.
NOTE: This valve must function with a load of 300 kg on the platform. The bursting of a hose can be
simulated by opening a valve that has been fitted between the hose and the power-pack.
Lubrication
Lubricate as following parts:
• The platform load bearing wire ropes with the special grease supplied.
• The cam, latch and wire rope sensor pins.
Fit the cheek plate covers onto the cross-member ends.
Fig. 16
e
0.5 mm
Adjusting
nuts
Fig. 20
Tamper-proof
Cap
Cap nut
Adjustment screw
Locknut
Pressure
gauge port
Replacement tamper-proof cap
Part No. 9420081
Fig. 21
A hydraulic power pack includes :
4 920 1604 14,4 x 18,1,5 copper seal
2 920 1613 M14 x 150 hollow bolt
1 920 1625 D6 Banjo adapter
1 937 1268 Motor 1,8 Kw / 2750 r.p.m
1 942 0067 Hyd Pump unit HPI 2cc
1 993 4109 120 x 180 Plastic pocket
1 Procedure adjustment limiting device
(See at the end of the document)