450D forward/reverse clutches slipping

[Harryt]

How do you check the pressures on the HLR clutch?

[DrLoch]

TESTING AND ADJUSTMENTS



Engine Clutch Assembly


1-Free Travel 3-Pedal Detent Adjusting
2-H-L-R Linkage Stop Nut Screw
Fig. 1-Adjusting H-L-R Linkage
Whenever the clutch and H-L-R linkage have been
removed, or clutch pedal free travel becomes less
than 3.25 inch (88.9 mm) or whenever H-L-R shifts
from high to reverse too aggressively, the linkage
must be readjusted. Be sure to make both adjustments
in the sequence given below.
First adjust clutch pedal free travel to 3.75 inch
(95.3 mm) at the clutch pad as follows: Remove left
footrest from crawler. Observe detent set screw on
clutch pedal arm on left side of clutch housing (Fig.
1). Loosen detent to increase free travel or tighten
screw to decrease free travel. Always end up with
screw in the detent (locked position).
Refer to Section 70, Group 25 and install pressure
gauge as instructed at the bypass valve port in the
accumulator housing through the access hole in the
transmission top cover.
Turn H-L-R clutch valve stop nut down until clutch
pedal just starts to pull away from stop, then back it
out five turns.
.


With both gear shift and H-L-R levers in neutral
and brakes locked, start engine and run at slow idle.
Turn the valve operating linkage stop nut (2, Fig. 1)
clockwise until the pressure at the gauge just starts
to drop. Then turn the nut in one additional turn.
NOTE: As the nut is turned, the pressure at the
gauge will increase to approximately 160 psi (1103
kPa) (11 bar) maximum and then drop approximately
5 psi (35 kPa) (0.35 bar) as the nut is turned further.
Check the adjustment by depressing the pedal 112
to 3/4 inch (12.7 to 19 mm). The pressure at the
gauge should rise approximately 5 psi (35 kPa) (0.35
bar). If the 5 psi (35 kPa) (0.35 bar) requires more
than 3/4 inch (19 mm) pedal travel, turn nut counter-
clockwise. If 5 psi (35 kPa) (0.35 bar) is at less than
1/2 inch (12.7 mm) pedal travel, turn nut clockwise.
Depress clutch pedal and be sure that the pedal
hits the firewall to prevent damage to the clutch
adjusting lever.
H-L-R Transmission
The H-L-R oil pressure test and speed of shift
adjustment are covered in Section 70, Group 25.
Check H-L-R linkage for wear. See Linkage Wear
Check in this section.


Proceed as follows to make the H-L-R lever
adjustment:
1. Shift H-L-R lever (11; Fig. 47, page 40-10-28) in
neutral detent (between high and reverse).
2. Hold H-L-R lever against back edge of slot in
neutral lock (7, Fig. 46, page 40-10-27). Apply pres-
sure to take play out of neutral lock.
3. Starting with the H-L-R rod yoke (15, Fig. 47,
page 40-10-28) adjust long. Shorten the H-L-R rod
yoke until pin (8) slips through the yoke and pivot
arm (22). Turn yoke 112 additional turn but not so
short that the pin will not slide freely into yoke and
pivot arm.

[jtrichard]

WOW were was "DEBUG" on that last post ?? ..... Lavoy are you making head way with the problem ??

[Stan Disbrow]

Hi,

I saw the long post and thought to ask the same thing!

I sorta have the feeling that De Bug is Inter Mittant.....

Stan