B - Ardiehl.de

DUAL PRESSURE MAIN RELIEF VALVE – 853H
(Cont’d)
Checking the High Setting
The tools listed will be needed to do the following
procedure:
MEL10003 – Hydraulic Tester
MEL10006 – Hydraulic Test Kit
Turn the key switch to the OFF position. Before the
engine stops running, turn the key switch all the way to the
left to release the hydraulic pressure at the front auxiliary
quick couplers.
Lift and block the loader. (See Page 1–1.).
Connect the hydraulic tester to the auxiliary quick coupler
[A].
The IN port on the tester connects to the female coupler
on the loader.
The OUT port from the tester connects to the male
coupler on the loader.
The hydraulic tester must be in the fully open
position before you start the engine. I–2024–0284
Put jackstands under the front axles and rear
corners of the frame before running the engine
for service. Failure to use jackstands can allow
the machine to fall or move and cause injury or
death.
W–2017–0286
Obtain a 3/8 inch (9,5 mm) I.D. hose (Item 1) [B] with a
3000 PSI (20685 kPa) rating or greater.
The hose loop (Item 1) [B] should be a total of 28 inches
(711 mm) in length (including quick couplers).
A small male coupler (Item 2) [B] (P/N 6648969) is
needed for one end of the hose, and a small female
coupler (Item 3) [B] (P/N 6648967) is needed for the other
end of the hose.
A 15K–5 fitting is also needed for each end of the hose
[B].
A 79K–6 O–ring is used toward the coupler side of each
fitting (this O–ring is included with each fitting).
Install a 15K–5 fitting on each end of the hose loop.
Install the female coupler (Item 3) [B] on one end of the
hose loop.
Drill orifice (P/N 6655091) size to .070 inch. Install the
threaded orifice (Item 1) [C] in the male coupler (Item 2)
[C] and install the coupler on the fitting.
A
B
C
2
1
1
2
P–05195
P–04717
P–04757
853, 853H BICS Loader
–2–23– Service Manual
3