43
4. Rotate adjusting screw until it contacts the switch
button. Continue to rotate the screw until the circuit is
completed (switch “clicks”). After the switch clicks,
rotate the adjusting screw an additional 1/2 turn.
Tighten jam nut.
Replacing the PTO Switch
1. Remove instrument cover and disconnect negative
battery cable from battery.
2. Move PTO lever forward to ON position.
3. Remove boot from button end of PTO switch (Fig. 59).
Retain boot for reinstallation. Separate switch wire
connectors.
1
Figure 59
1.
PTO switch
4. Remove front jam nut securing switch to mounting
bracket and remove switch.
5. Install new PTO switch to mounting bracket. Adjust
switch so it is depressed 1/2 in. (13 mm) when PTO
lever is moved to OFF position. Tighten jam nuts to
75 in.-lb. Install boot to switch.
Important
Switch threads will be damaged if jam nuts
are over tightened.
6. Connect a continuity tester or ohm meter to switch
connector. With PTO lever in the ON position the
switch circuit should not have any continuity. If there
is continuity, recheck switch installation. If there is no
continuity, proceed to next step.
7. Move PTO lever to the OFF position. When PTO lever
is in its normal, released position, the PTO switch
should have continuity. If there is no continuity,
recheck switch installation. If there is no continuity,
proceed to next step.
8. Push switch connectors together.
9. Connect battery cable and install instrument cover.
Adjusting PTO Drive Belt
Tension
Important
Check PTO belt tension initially after first
10 hours and 50 hours of operation and after every 100
hours of operation thereafter.
If belt begins to slip because it has stretched or because of
worn linkage adjust as follows:
1. Unlatch and remove instrument cover.
2. Move PTO control lever to ON position.
3. Measure length of PTO spring between flat–washers
(Fig. 60). There should be a spring length of 3-3/16 in.
(81 mm).
4. To adjust, hold head of adjusting screw with wrench
(under PTO actuating arm) and turn locknut (Fig. 60).
5. Move PTO lever to OFF position and install instrument
cover.
1
2
3
Figure 60
1.
3-3/16 in. (81 mm)
2.
PTO actuating arm
3.
Locknut
Summary of Contents for Groundsmaster 328-D
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