User Guide

766238 8/06 15-3
4500 Engine & Hydraulic Set-Up Procedures-Mechanical Gov
4500 ENGINE & HYDRAULIC SET-UP PROCESS IN TEST & ADJUST POSITION
Step 1. Check fluid levels.
• Engine Oil Capacity: 3 & 1/2 Quarts
• Hydraulic System Capacity: 3 & 1/2 Gallons (With 11 ounces of Lubrizol #5178
additive.)
• Cooling System Capacity: 3 & 1/4 Gallons of 50-50 Mixture Ethylene Glycol &
Water
Step 2. Adjusting the Neutral Lock Switch
• The neutral lock switch (023002) can be damaged if not properly adjusted. To
insure proper adjustment, put the front neutral lock (467811) in the down
position. Check the switch to make sure both switch boot nuts (023044) and
switch boot (023051) are installed. With the switch loosely installed in position,
begin to move it upward until you hear the switch click. Lock the switch boot in
position with switch boot nuts. Continue to hold switch in this position and
tighten the switch mount bolts and nuts. Warning: the switch can be damaged
by overtightening. After tightening the switch mount fasteners, check the
installation by opening and closing the front neutral lock lever several times to
make sure the switch is clicking and that it is not being forced down past its
travel length.
Step 3. Choke Adjustment (done while engine is not running)
• Position choke lever in middle of slot (front of tractor on panel located next to
footrest). Using the choke lever on the carburetor, position the choke plate in a
vertical position. With the choke lever and the choke plate in this position,
attach the choke cable to each. Cable will be correct length.
Step 4. Engine Speed Setting
• Engine speed is pre-set at factory.
• Check throttle control to make sure it is in the correct positions with respect to
the engine speed specifications.
+ Idle = 950-1050 RPM’s
+ Maximum = 3250 RPM’s
• Check speed with pump disengaged.
Step 5. Set and Adjust Governor Speed Control Linkage
a. Remove oil level plug on R/H lower front of governor. If no oil is
present, remove oil fill plug on top of governor and add 10W40 motor
oil until it leaks out at oil level hole.
b. With engine at operating temperature, adjust carburetor idle mixture
screw by turning clockwise until RPM’s drop from being too lean.
Turn idle mixture screw counter-clockwise until RPM’s increase and
then drop from being too rich. Turn idle mixture screw clockwise until
RPM’s increase and engine runs smooth with no pulsations.
c. (See View A) Adjust eye-bolt (B) to 1.03 inch dimension. Set surge
screw (C) to .70 inch dimension. Set high speed stop screw (E) to