Thermo King SLXi Spectrum, Maintenance Manual

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Engine Maintenance 9-34
8. Place the upper belt in the blower pulley, the idler, and the jackshaft pulley. Check the upper belt alignment in the idler. Belt
center must align with the idler groove center. Align by adjusting the idler pulley between the support brackets.
9. Place the lower belt in the engine (or electric motor) pulley, the idler pulleys (if equipped) and in the jackshaft pulley.
10. Check the lower belt alignment in the idler pulleys (if equipped). Belt center must align with idler groove center. Align by
installing spacer washer between mounting plate and idler pulley assembly. Correct alignment should require:
• Model 30 units (3/99 and After): 1 washer, 12.7 mm thick with 56 mm O.D. on rear idler; and 1 washer, 9.5 mm thick with
56 mm O.D. on front idler.
• Model 50 units (3/99 and After): 1 washer, 4.8 mm thick with 56 mm O.D. on rear idler; and no washer at the front idler.
• Use additional washers if required for correct belt alignment.
11. Tighten the bolts that fasten the jackshaft to the jackshaft angle.
12. Move the idler toward the back of the unit until any slack is taken out of both the upper and lower belts. Tighten the idler in
this position.
13. Pull on the jackshaft adjustment arm. Move the jackshaft towards the front of the unit and allow the jackshaft to rotate on the
jackshaft angle pivot bolts until both the upper belt reads 75 and the lower belt reads 80 (85 on TCI model with 120 ampere
alternator) on the belt tension gauge.
14. Tighten the jackshaft in this position. Make sure to tighten all of the jackshaft adjustment arm bolts and the jackshaft angle
pivot bolts.
15. Install and adjust the alternator belt.
Belt Arrangement – SL 50 Models
1. Jackshaft Adjustment Arm
2. Jackshaft
3. Upper Fan Belt
4. Alternator Belt
5. Alternator Adjustment Arm and Mounting Bracket
6. Idler Pulleys and Tension Bracket (3/99 and After)
7. Idler Pulleys and Tension Bracket (Before 3/99)
8. Lower Fan Belt
9. Water Pump Belt
10. Water Pump Pulley, Adjustable
11. Compressor Drive Belts