﻿GET_GEVOMechL2_09_01_01_54 - STEP-BY-STEP Cont Screen
1
00:00:00,000 --> 00:00:13,833
5. Using a ¾-inch air impact wrench, tighten the four alternator top flange mounting bolts evenly (the inner top flange bolts first followed by the outer top flange bolts), while alternating sides.

2
00:00:13,833 --> 00:00:18,167
<b>Caution:</b> Top flange torque values influence web deflection readings.

3
00:00:18,167 --> 00:00:22,042
Never use an impact wrench as a substitute for a torque wrench.

4
00:00:22,042 --> 00:00:28,833
Consistency in dial indicator readings depends on consistent alternator top flange mounting bolt tightness. 

5
00:00:28,833 --> 00:00:45,500
<b>Caution:</b> Setting a desired torque using the 0 - 1000 lb.-ft. (0 - 1356 Nm), 1-inch Square Drive Torque Wrench (TESCO T18250) is unique compared to most other torque wrenches.

6
00:00:45,500 --> 00:00:49,000
Ensure the correct dial face scale is used.

7
00:00:49,000 --> 00:01:10,167
6. Torque the four alternator top flange mounting bolts (the inner top flange bolts first followed by the outer top flange bolts) to 650 ± 25 lb.-ft. (881 ± 34 Nm) and repeat this torque pattern to confirm the proper torque.

8
00:01:10,167 --> 00:01:16,417
7. Verify that the crank-position dial indicator gauge readings are within the ranges. 

9
00:01:16,417 --> 00:01:22,750
<b>Note:</b> These are direct-dial indicator readings and not TIR calculations.

10
00:01:22,750 --> 00:01:44,667
8. If needed, equally add or remove the shims at the top right and left flanges to achieve a reading of -0.003 ± 0.0005 inches (-0.076 ± 0.0127 mm) in position C.

11
00:01:44,667 --> 00:01:48,500
<b>Note:</b> The minus sign indicates web compression.

12
00:01:48,500 --> 00:02:01,667
<b>Note:</b> When using the alternator conical mounting plate bolt wrench (TESCO T85891) to torque the inboard conical mount base plate bolts, adjust the torque value to compensate for the tool length.

13
00:02:01,667 --> 00:02:12,125
This is best accomplished with a torque wrench testing device such as TESCO T67490 or T67500.

14
00:02:12,125 --> 00:02:16,875
Apply the tool to the torque wrench at the same angle as needed to tighten the bolt.

15
00:02:16,875 --> 00:02:30,917
Adjust the torque wrench setting to the value needed to register 175 ± 10 lb.-ft. (237 ± 14 Nm) on the tester.

16
00:02:30,917 --> 00:02:39,750
If a tester is not available, refer to customer-specific documentation for a method to manually calculate the correct torque wrench setting.

17
00:02:39,750 --> 00:02:50,958
<b>Note:</b> Tightening and torquing of the inboard, aux cab end, conical mount bolt is accomplished by first removing the inboard, engine end, conical mount bolt.

18
00:02:50,958 --> 00:03:07,458
9. After alignment is complete, torque the 5/8 -11 x 2-inch alternator conical plate mounting bolts and hardened washers to 166 - 185 lb.-ft. (225 - 250 Nm). 

19
00:03:07,458 --> 00:03:35,958
<b>Note:</b> If the conicals mount to a removable plate that mounts to the platform, torque the 7/8 - 9 x 3.25-inch plate bolts and hardened washers to 440 - 490 lb.-ft. (596 - 664 Nm) and then torque the conicals to the plate to 166 - 185 lb.-ft. (225 - 250 Nm).



