MDC Neutral Adjustment
(1) External control linkage. (2) Servo gauge ports.
For photographic purposes the pump is shown
out of machine.
Ensure the engine is set to low idle before
Remove external control linkage (1) from the control
handle. Install a 0 to 2065 kPa (0 to 300 psi) gauge in
the servo gauge port (2) of the propel pump. There is a
second servo port on the opposite side of the pump.
Loosen the washer head screw to allow the neutral
bracket to move, but not freely.
Start the engine and slowly accelerate to normal
Insert a Phillips screwdriver into the 1/4 inch clearance
hole and engage the slot of the neutral adjust bracket.
Slowly rotate the bracket, using the Phillips screwdriver,
until the pressure is equal on both servo gauges.
Then, slowly rotate the bracket until one of the servo
gauges starts to increase in pressure. Mark the position
of the bracket.
Now, slowly rotate the bracket in the opposite direction
until the other servo gauge begins to increase in
pressure. Mark the position of the bracket.
Rotate the bracket to a position between the two marks,
and hold while torquing the washer head screw to 11 to
15 Nm (95 to 132 lb-in).
Stop the engine. Remove the gauges and install the
gauge port plugs. Install and adjust, if necessary, the
external control linkage.
Swashplate Neutral Adjustment Procedure
Axle Propel Pump
Make sure the parking brake is applied, and the propel
control lever is in the STOP position.
(1) Test port far axle pump (forward direction). (2) Test port for drum
pump (forward direction). (3) Test port for axle pump (reverse
direction). (4) Test port for drum pump (reverse direction).
Connect four 60 000 kPa (8700 psi) pressure gauges to
test ports (1), (2), (3) and (4).
(5) Adjustment screw. (6) Servo control lines.
This procedure should be performed with the
machine off the ground (raise drum and wheels
off the ground).