Denyo DCA-600P, Instruction Manual

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5-2-3 Checking/every 500 hours
Checking/every 250 hours is also required.
(1) Inspection, adjustment and replacement of alternator and fan belt
1. Inspection
Check all drive belts and replace a belt if it is worn or damaged.
Where more than one belt is used between two pulleys, all of the
belts must be replaced together. Maximum belt life will be obtained
only if the belts are kept at the correct tensions. Where more than
one belt is used, check/adjust the tension on the tightest belt.
2. Fan Belt Adjustment
Remove the fan guards and proceed as follows.
Use a Borroughs belt tension gauge to check the tension at position
(1). It should be 714 N (160 lbf). To adjust the tension, proceed as
follows:
①
Loosen the large lock nut on the belt tensioner and turn the
adjustment setscrew (2) until the correct tension is obtained. Fully
tighten the large lock nut to 280 Nm (207 lbf ft) and check the
tension of the belts again. If the tension is correct, loosen the adjustment setscrew (2) just enough to
release the tension.
②
Fit the fan guards and run the enginr for 15 minutes. With the engine stopped, remove the guards
and check again the tension.
③
When the correct tension is obtained, fit the fan guards.
3. Alternator Belt Adjustment
Remove theaccess panel in the fan guard and proceed as follows.
Use a Borroughs belt tension gauge to check the tension at (5). It should be 625 N (461 lbf). To
Adjust the tension, proceed as follows:
①
Loosen the alternator to obtain the correct belt tension and tighten the bolt/setscrews to 70 Nm
(51.63 lbf ft).
②
Fit the access panel to the guard and run the engine for 15 minutes. Remove the access panel and
check again the tension.
③
When the correct tension is oftained, fit the access panel to the fan guard.
4. Replacement of the Fan Drive Belt
①
Remove the belt guard.
② Remove the six setscrews which secure the fan and hub assembly to the pulley and remove the
assembly.
Caution: Take care during the removal of the fan; ensure that the radiator dose not become damaged.
③
Loosen the belt tensioner and remove the old belts. Ensure that the grooves of the pulley are
free from grease and dirt and fit a new set of belts.
④
Fit the fan and tighten the setscrews securely to 46 Nm (33.93 lbf ft). Adjust the fan belts to the
correct tension, see “Fan Belt Adjustment”, and fit the fan guards.
5.Replacement of the Alternator Belt
①
Remove the fan guards.
②
Remove the six setscrews which secure the fan and hub assembly to the pulley and remove the
assembly.
Caution: Take care during the removal of the fan; ensure that the radiator dose not become damaged.
③
Loosen the adjustment bolt/setscrews to selease the tension on the alternator belt and remove
the old belt. Check that the pulley grooves are clean and fit new belt.
④
Fit the fan and tighten the setscrews securely to 46 Nm (33.93 lbf ft). Adjust the alternator belts
to the correct tension, see “Alternator Belt Adjustment”, and fit the fan guards.