2122.6-0000010 OM
238
6.13.2 Instructions for troubleshooting in HLL
Possible failures in HLL and guidelines for troubleshooting are shown in Table
6.13.2.
Table 6.13.2
Failure, external manifestation,
cause
Troubleshooting
Pressure loss in the hydraulic system of lift linkage (RLL as well as FLL cannot
be lifted), pressure loss is accompanied by unwanted knocks and sounds
Breakdown of LL hydraulics pump The pump shall be replaced
Breakdown of pump drive for LL
and transmission hydraulics.
The pumps shall be repaired or replaced
Pressure loss in the hydraulic system, loaded lift linkage (RLL and FLL) will
not lift up or will not lift to the top, there are no unwanted sounds
Sticking of pressure cutoff valve
(P=24.5 MPa) 1 (figure 6.13.6)
For troubleshooting mount a pressure gauge
with 25 MPa scale to the lifting clutch for section
No1 of the distributor EHS. Set the control joystick
for section No 1 of the distributor EHS to the “uplift”
position and measure the pressure which shall stay
within 20 to 21 MPa. If the pressure is significantly
lower unscrew valve 1 (figure 6.13.6), wash it and
its seat. Mount the valve back. Set the control joy-
stick for section No 1 to the “uplift” position and
double check the pressure which shall stay within
20 to 21 MPa.
Spontaneous lowering of RLL (lowering without a command received from
the instrument panel or remote control buttons)
Sticking of the lowering valve of a
regulatory section
ЕН
R-23LS
Failure can be eliminated only by a dealer in a
service centre in the following manner:
- dismount the electro hydraulic section (E
Н
R),
by unscrewing the nuts of the stud-bolts of the in-
tegral unit. During dismounting procedure pay at-
tention to integrity of the O-rings and the OR-valve,
both in the regulatory section and in the distribution
valve neighboring section;
- disassemble the lowering valve
ЕН
R-23LS
and rinse its components;
- put the electro hydraulic section (E
Н
R) back in
its place. During mounting pay attention to integrity
of the O-rings and OR-valve in the regulatory sec-
tion and in the distribution valve neighboring sec-
tion.
https://tractormanualz.com/
