PUMP GP-GEAR 2897912 - Caterpillar

Illustration 2 g01391211
A formula for calculating the inertia limits is given in the following example: (3) Drive Shaft Inertia = 5.73 lb ft2 (4) Input Shaft Inertia = 3.77 lb ft2 (5) Gear Ratio = 1.96 (6) Intermediate Shaft Inertia = 2.86 lb ft2 (7) Pump/Rotor (wet) Inertia = 9.87 lb ft2Total Reflected Inertia Limit = TRIL#Maximum Inertia Example (Worst Case)Note: All inertia units are: lb ft2 = #TRIL# = 5.73# + 3.77# + 1.962(2.86# + 9.87#) = 58.4#____________________Locations for the Support Brackets
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If bolts are removed from the CX31 transmission to add mounting brackets, and so on, the bolts must be replaced with longer bolts so that thread engagement is maintained. The replacement bolts must be of the same grade and torqued to the required specifications.Thread engagement length and bolt torques are critical on the Aluminum Case and Cover of the CX Transmissions. The bolts selected must have a thread engagement length of twice the bolt diameter. Standard torques on short bolts will strip the threads. The bolts must not be too long because the bolts will bottom out and crack the case.
Illustration 3 g02448421
(64) Bolt locations for support brackets
Illustration 4 g02448883
(65) Bolt locations for support brackets____________________BOLT TORQUESTightening torques are called out in the installation dimensional drawings. Tightening torques that are called out in the installation dimensional drawing take precedence over the standard torque values. The dimensional drawings are in the Appendix of Special Instruction, REHS2790, "Application and Installation Guide (Mechanical)".Standard Bolt TorquesNote: The torques in the following tables are based on metric Grade 10.9 or higher fasteners (SAE Grade 8 or higher inch fasteners). Use hardened washers. Split lock washers are not permitted.
Table 2
Inch Nuts and Bolts    
Thread Size (Inch)    Standard Torque    
1/4    
12 3 N m (9 2 lb ft)    
5/16    
25 6 N m (18 4 lb ft)    
3/8    
47 9 N m (35 7 lb ft)    
7/16    
70 15 N m (50 11 lb ft)    
1/2    
105 20 N m (75 15 lb ft)    
9/16    
160 30 N m (120 22 lb ft)    
5/8    
215 40 N m (160 30 lb ft)    
3/4    
370 50 N m (275 37 lb ft)    
7/8    
620 80 N m (460 60 lb ft)    
1    
900 100 N m (660 75 lb ft)    
1 1/8    
1300 150 N m (960 110 lb ft)    
1 1/4    
1800 200 N m (1320 150 lb ft)    
1 3/8    
2400 300 N m (1780 220 lb ft)    
1 1/2    
3100 350 N m (2280 260 lb ft)    
Table 3
Metric Nuts and Bolts    
Thread Size (Metric)    Standard Torque    
M6    
12 3 N m (9 2 lb ft)    
M8    
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