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Rev: 8/2008
18 of 21
36B, 36BX, 36H, 36HX, 52H, 52HX
DEK
®
is exclusively distributed by GXi International, LLC
Heavy Duty Power Equipment
Service Adjustments
Engine to Transmission Belt Adjustment
Belt Drive System
1. The engine to transmission belt, located underneath the
rear deck, should move 3/16” with 5 lbs. of pressure ap-
plied midway on the belt between the transmission pulley
and the engine output shaft pulley.
2. To adjust the belt, loosen nut “A” on idler pulley “B”.
3. Slide idler pulley “B” to tighten or loosen and secure in
place by tightening nut “A”.
Figure 17
Safety System Adjustments (See Figure 18)
There are generally 3 ways to adjust the sensitivity of a safety
switch. The most appropriate way for to adjust each switch will
depend upon the application, location, and the nature of the prob-
lem you are encountering.
Method 1—adjust location using the mounting screws
1. Move the blade control lever to “OFF”.
2. Loosen screws “A” until safety switch “B” moves freely.
3. Slide safety switch “B” firmly against blade bellcrank “C”.
4. Tighten screws “A” and check that safety switch “B” does not
move.
Method 2—adjust location using adjustment nuts on switch body.
1. Loosen locking nut “C” on the sensor shaft.
2. Adjust switch location by turning the nuts.
3. Tighten the locking nut when proper adjustment is achieved.
Method 3—relocate mounting holes.
In rare instances whereby the components are mis-aligned, the
easiest means of adjusting the location is to elongate the existing
holes or add new holes that achieve a tighter fit between the acti-
vation rod and the sensor.
Figure 18
WARNING
DANGER: Do not bypass, modify, alter, or disconnect the
safety system. Make sure that the safety interlock system is
fully operational each time before mowing. Failure to do so
could present danger to you and others around you.
IMPORTANT! The mower belts are adjusted to ensure
the blades stop turning within 7 seconds of releasing the
blade control lever. If you are making any belt adjust-
ments whatsoever, for your safety and the safety of oth-
ers around you, you must ensure the belts are re-
adjusted to achieve this design specification.
A
B
Hydro Drive System
1. The engine to transmission belt, located underneath the
rear deck, should move 3/16” with 5 lbs. of pressure ap-
plied midway on the belt between the transmission pulley
and the engine output shaft pulley.
2. To adjust the belt, turn nut “C” on the threaded tension
rod found on the right, rear corner of the mower.
3. Do not over-tighten. This could cause serious damage to
the hydraulic drive systems.
C
A
B
C