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The engine to transmission belt, located underneath the rear deck, should move 3/16” with 5 lbs. of pressure applied 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”. A B Figure 17 Hydro Drive System 1. The engine to transmission belt, located underneath the rear deck, should move 3/16” with 5 lbs. of pressure applied 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. Safety System Adjustments (See 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. 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 problem 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 activation rod and the sensor. C Figure 18 A B C 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. DEK® is exclusively distributed by GXi International, LLC Rev: 8/2008 18 of 21 Heavy Duty Power Equipment 36B, 36BX, 36H, 36HX, 52H, 52HX Troubleshooting Problem Possible Causes Solution Engine will not start 1. Key is in the off position 2. Insufficient fuel in the tank 3. Air bubble in the fuel line 4. Fuel valve in OFF position 5. Choke not ON 6. Choke linkage is out of adjustment 7. Low engine oil 8. Blade control is in the ON position 9. Transmission is in gear (belt drive model). 10. Spark plug wire is lose 11. Spark plug is fouled 12. Air filter is plugged or dirty 13. Bad gasoline 14. Fuel filter is plugged or dirty 15. Safety switches are out of alignment or loose. 16. Battery is dead (electric start models) 1. Water in the fuel 2. Loose safety switch 3. Fuel valve is OFF 4. Dirty fuel filter 5. Dirty air filter 6. Low engine oil 1. Turn key to ON position 2. Add gasoline 3. Prime engine or shake bubble 4. Turn valve ON 5. Turn choke on 6. Adjust choke linkage (p. 11) 7. Add engine oil 8. Push lever to OFF position 9. Slide lever firmly into “N” or neuposition 10. Tighten wire or connections 11. Clean or replace the plug 12. Clean or replace the air filter 13. Drain and replace the gasoline 14. Replace the fuel filter 15. Adjust or tighten switches (p. 1read warnings! 16. Recharge or replace the battery To test if the blade activation safety switches are a contributing factor toengine not starting, try depressing t“operator present” switch o the hanbars while trying to start. If engine a safety switch adjustment is requir1. Drain and replace the fuel 2. Adjust switch (p. 18) 3. Turn fuel valve ON 4. Replace fuel filter 5. Clean or replace air filter 6. Add engine oil out 8) - he dle starts, ed. tral the EEngine will not keep running / quits ngine stops when blades are engaged 1. Loose safety switch 2. Belt tension too high 3. Blades jammed with foreign material 1. Adjust switch (p. 18) 2. Adjust belt (p. 17 and 18) 3. Remove foreign material Note: sometimes firmly pushing the blade control lever into the OFF position g the Blades do not turn ngine stops when belt drive mower is 1. Broken belt 2. Loose belt 3. Blade activation linkage out of adjustment. 1. Loose safety switch 2. Transmission seized 3. Safety switches not engaged can resolve this problem by ensurinsafety switch is fully engaged. 1. Replace belt 2. Adjust belt (p. 17 and 18) 3. Adjust linkage (p. 17) 1. Adjust safety switch (p. 18) 2. Call for assistance 3. Depress safety switches BEput into gear elts squeal when blades are engaged Belts slip when blades are engaged 1. Incorrect belt tension 2. E...

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