TASK 32-42-00-810-815

 Loss of the Signal from the Tachometer (Wheel 4) to the BSCU
 1. Possible Causes
_______________
 - BSCU (10GG)

 - wiring from the BSCU (10GG) pins AB/8K, 8J to the first terminal block

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 32-42-00-720-002 Functional test of the tachometers
 AMM 32-42-00-720-003 Functional Test of the tachometers with the AIDS.
 AMM 32-42-34-000-001 Removal of the Braking/Steering Control Unit (BSCU)

 (10GG) AMM 32-42-34-400-001 Installation of the Braking/Steering Control Unit (BSCU) (10GG) ASM 32-42/02
 3. Fault Confirmation
__________________
 A. Test Do the functional test of the tachometer (Ref. AMM TASK 32-42-00-720-002) or (Ref. AMM TASK 32-42-00-720-003)
 4. Fault Isolation
_______________
 A. If the test confirms the fault:
 - do a check and repair the wiring from the BSCU (10GG) pins AB/8K, 8J to the first terminal block (Ref. ASM 32-42/02).
 (1) If the fault continues:
 - replace the BSCU (10GG) (Ref. AMM TASK 32-42-34-000-001) (Ref. AMM TASK 32-42-34-400-001).
 B. Do the functional test given in Para. 3.A.
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞32-42-00∞∞∞∞∞∞∞∞∞∞Page 225
 May 01/05R
 CES

 TASK 32-42-00-810-816

 Failure of the Tachometer (Wheel 4)
 1. Possible Causes
_______________
 - DRIVE ASSY-TACHOMETER,WHEEL 4 (2678GM)
 - TACHOMETER-WHEEL 4 (22GG) R - wiring from the tachometer (22GG) pins A/A,C to the first terminal block
 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
R  31-32-00-810-933 AMM 32-41-11-000-006  Failure of the Analog Links Removal of the MLG Wheel 
R R  AMM 32-41-11-400-006  (2649GM,2650GM,2651GM,2652GM) Installation of the MLG Wheel 
R  AMM 32-42-00-720-002  (2649GM,2650GM,2651GM,2652GM)Functional test of the tachometers
 AMM 32-42-00-720-003  Functional Test of the tachometers with the AIDS.
 AMM 32-42-57-000-001  Removal of the Tachometer
 AMM 32-42-57-400-001  Installation of the Tachometer
 AMM 32-42-68-000-003  Removal of the MLG Tachometer-Drive
 AMM 32-42-68-400-003  Installation of the MLG Tachometer-Drive
 ASM 27-92/25 ASM 32-42/02
 3. Fault Confirmation__________________ 
R R A. Not applicable 
4. Fault Isolation_______________ 

R A. Remove the hubcap or the debris guard (if brake fans are installed) (Ref.
R AMM TASK 32-41-11-000-006).

R (1) Do a visual inspection of the tachometer drive mechanism and make
R sure that:
R - the tachometer drive shaft moves freely.
R - there is no deformation (twisting) and/or sign of friction on the
R drive shaft.
R - the splines of the tachometer drive shaft are in the correct
R condition.
R - the splines of the tachometer hubcap or the splines of the debris
R guard (if brake fans are installed) are in the correct condition.

 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞32-42-00∞∞∞∞∞∞∞∞∞∞Page 226
 May 01/05 CES

R  (2) If the tachometer drive is damaged: 
R  - replace the DRIVE ASSY-TACHOMETER,WHEEL 4 (2678GM) (Ref. AMM TASK 
R  32-42-68-000-003) and (Ref. AMM TASK 32-42-68-400-003). 
R  (3) If the tachometer hubcap or the debris guard (if brakes fans are 
R  installed) is damaged: 
R  - replace the tachometer hubcap or the debris guard (if brakes fans 
R  are installed) (Ref. AMM TASK 32-41-11-000-006). 
R  (4) If the tachometer drive mechanism is not damaged: 
　
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