3500B Engines for Caterpillar Built Power Modules Alternator Mounting Caterpillar


Alternator Mounting
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1.1. 197-9087 Belt Tension Chart


Illustration 1g03660699

Table 1
Specification for 210-1228 Alternator Mounting Gp, and 335-4161 Alternator Mounting Gp 
Item  Qty  Part  Specification Description 
Tighten the pulley retaining nut to 110 ± 10 N·m (81 ± 7 lb ft).
Maximum misalignment between pulley assembly (3) and pulley (1) is 0.4 degrees. 
Adjust the belt tension according to the 197-9087 Tension Chart. 
235-2484 Lip Type Seal  Lubricate the sealing lip lightly with the lubricant that is being sealed. 

197-9087 Belt Tension Chart

Table 2
Specification for 197-9087 Belt Tension Chart 
Size of Belt  Width of Belt  Gauge Reading  Gauge (Force)  Belt Tension (Frequency)
“Initial”(1) 
Belt Tension (Frequency)
“Used”(2)(3) 
Gauge (Frequency)  
Belt Tension (Force)
“Initial”
(1)
Belt Tension (Force)
“Used”
(2)(3)
Basic Gauge Number  Gauge Number 
8 - RIB
POLY - RIB 
27.82 mm (1.095 inch)  800 ± 22 N (180 ± 5 lb)  489 ± 44 N (110 ± 10 lb)  BT-33-109  98 ± 10 HZ  76 ± 8 HZ  Clavis Type 14 
Do not use the belt tension chart for belts with tensioners that are spring loaded. 
Measure the tension of the belt that is farthest from the engine. 
(1) Belt tension “lnitial” is for a new belt.
(2) Belt tension “Used” is for a belt that has operated for 30 minutes or more of operation at the rated speed.
(3) If a belt falls below the “Used” belt tension, the belt should be tightened again to the high side of the “Used” belt tension.

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