G3520E Generator Set Engines Caterpillar


Alternator Mounting

Usage:

G3520E FZJ


Illustration 1g02123393
Left side view

Table 1
Specification for 352-8947 Alternator Mounting Gp 
Item  Qty  Part  Specification Description 
235-2484 Lip Type Seal  Lubricate the sealing lip lightly with the lubricant that is being sealed. 
Tighten the pulley retaining nut to 110 ± 10 N·m (81 ± 7 lb ft)
Maximum misalignment between 300-8570 Pulley As (5) and 7E-4839 Pulley (3) is 0.4 degrees. 
Adjust the belt tension of the serpentine belt according to the 197-9087 Belt Tension Chart. 

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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