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Page Title:
ADJUSTING TRANSMISSION SHIFT LINKAGE |
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 Applying parking brake. Start
Make sure you have full travel and can
b.
feel the detents in all positions -
engine and operate at governed RPM.
neutral, forward and reverse for the
Hold tilt lever back while gradually
forward-reverse shift lever, and high
closing the load valve until pres-
and low for the high-low shift lever.
sure reaches 1500 psi.. Continue to
If you cannot feel the detents in any
hold the tilt lever until hydraulic
one of these positions adjust the link-
fluid reaches test temperature (120)
age as follows:
degrees F.)
With the hydraulic fluid
at this temperature, make a note of
Step 1.
Remove the two capscrews from
the flow reading so it may be com-
the cowl access hole cover and remove
pared with the rate of flow found in
the cover.
the following step.
Step 2.
Measure the distance (Refer to
With engine operating at
c.
figure 4-74) of the high-low linkage rod,
governed RPM, hold tilt lever in
The
and the forward-reverse linkage rod.
back position and continue to close
pre-set measurement is 18" for the high-
the load valve until the pressure
low linkage rod at neutral position and
no longer increases on the gauge.
13.38" for the forward-reverse linkage
( C l o s e the load valve ONLY ENOUGH
rod at neutral position.
to reach the peak pressure reading
If adjusment is to be made
Step 3.
and avoid holding the lever longer
proceed as follows:
than necessary to check rate of
flow and pressure).
Remove the cotter pins from the
a.
link pins and remove the link pins from
The pressure reading will
d.
(Refer to
the linkage arms and clevis.
indicate the setting of the relief
Let linkage rods drop
Figure 4-74).
The flow reading should be
valve.
free, do not remove.
compared with the flow register at
Make necessary adjustments
by
1500 psi.
If the pump or valve is
b.
loosening lock-nuts and turning
clevis
worn, flow will drop off appreciably
to make measurement fall within
the pre-
This is
as pressure is increased.
set measurements of linkage rods
when
due to internal oil slippage in the
they are assembled.
components.
NOTE
After adjustment is made tighten
c.
Severely vibrating gauges are
lock nuts and install the linkage rods
often an indication of entrained
to their prospective linkage arms and
air.
Check for suction line leaks.
install the link pins and cotter pins.
Measure the distances again and see if
If readings taken are not re-
e.
they fall within the pre-set measure-
asonably close to those listed in
ments, if they don't make adjustment
specifications, appropriate repairs
again.
Report to designated
should be made.
Test linkage for full travel and
d.
authority.
that you can feel the detents in all
positions.
ADJUSTING TRANSMISSION SHIFT
4-67.
LINKAGE (Refer to Fig. 4-74)
e.
Install cowl access hole cover
and its fasteners.
Check forward-reverse and high-
a.
low control linkages for correct ad-
justment.
If these linkages are out
of adjustment operation of the trans-
mission will be adversely affected.
4-51
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