Textron JACOBSEN GP400, Technical/Repair Manual

Page: 37 / 354

ENGINE
4252490-Rev A 3-7
3
Repair—Diesel Models
Fan Belt (Diesel)
Removal
See Figures 3-6 and 3-7.
!
CAUTION
NOTE
Inspect and adjust the new engine belt after the first 50
hours of operation. Check and adjust annually thereafter.
1. Park the mower safely. (See “Park Mower Safely” on
page 1-6.)
2. Raise the hydraulic oil/fuel tank. (See “Raise
Hydraulic Oil/Fuel Tank” on page 9-4.)
Figure 3-6
3. Loosen screws (2) and push the alternator (3) toward
the engine to loosen the fan belt (1).
Figure 3-7
4. Remove fan belt (1) from the alternator (3), coolant
pump (5), and crankshaft pulley (4).
Installation
1. Install fan belt by reversing the order of removal.
2. Adjust belt tension by loosening alternator mounting
screws (2) and pulling the alternator (3) against the
belt (1) until proper tension is achieved.
3. Measure belt tension at the midpoint between
pulleys. Adjust fan belt to 0.28–0.35 in.
(7–9 mm) deflection with a tension of 22 lb (98 N).
NOTE
See the engine manufacturer’s manual for further
information.
Use extreme care when working near the muffler.
Do not attempt to service when the engine is hot.
Serious personal injury can occur.
TN3901
2
2
1
3
1
TN1113
5
4
3