Jacobsen ZB Series, Safety, Operation And Maintenance Manual

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8 MAINTENANCE AND LUBRICATION
8.5 ENGINE AUXILIARY BELT ______________________________________________
Check and adjust the auxiliary belt
The auxiliary belt tension is adjusted to prevent the stress on the alternator bearings and to prevent movement
on the alternator pulley. Use the procedure shown below to check the belt tension at the center of the belt
between crank shaft and alternator pulleys.
Alternator belt
1. Loosen the alternator bolt (A) and the pivot bolt below the alternator.
2. Move the alternator to tighten or loosen the belt. A deflection of 7 to 9 mm
is needed at the center (B) with a load 10Kgf (98N/22lbs) for a new belt.
A deflection of 8 - 10mm is needed for a used belt.
3. Tighten the bolts.
AC Compressor belt (mowers with cabin only)
1. Loosen AC compressor pivot hardware (C).
2. Adjust tensioner bolt (D) as required to tighten or loosen the belt. A
deflection of 3/16 in. (4.7 mm) is needed at the center (E) with a load
of 4.62 lbs (2.09 kgf/20.5 N).
3. Tighten the pivot hardware (C).
8.6 ENGINE COOLANT ______________________________________________________
Check coolant level each day. The radiator must be full and the recovery bottle must be at the cold mark.
Drain and fill the cooling system each year. Empty and clean the recovery bottle.Mix clean water with antifreeze
for the coldest ambient temperature. Read and follow the instructions on the anti-freeze container and the engine
manual.
WARNING
To prevent injury from the hot engine coolant or steam, never remove the radiator cap with the engine
in operation. Stop the engine and wait until the radiator is cool. When radiator is cool, use caution to
remove the radiator cap.
WARNING
The engine fan could start up unexpectedly.
CAUTION
Do not put cold coolant mixture into a hot radiator.
Do not operate the engine without a correct coolant mixture. Install the radiator cap correctly.
Mowers with 2 Post ROPS.
Mowers with cabin.
A
B
A
B
E
C
D