FT4924

FT4924 Curbside Exterior Mirror Water Intrusion
Technical writer name
Devanand
First Level Parts
Material
Part Number
-
-
QTY
Manual section
18
Nb hours Level 1
Nb hours Level 2
0.25 hr
MQR
7621-2085
0.5 hr
-
Disposal of parts
Second Level Parts (50% of 191 vehicles)
Material
Part Number
GASKET MIRROR
N65176
GASKET MIRROR SAFEFLEET LH 1/4
N91045-01
GASKET MIRROR SAFEFLEET LH 3/8
N91045-02
GASKET MIRROR SAFEFLEET LH 1/2
N91045-03
NUT LOCKNYL M10 YZ TRIV 96H G8
N11243
Note: Each vehicle will use only 1 of these 3 gaskets
Shop Supply (100% of 191 vehicles)
Material
Part Number
SEALANT BUTYL 757
N32989
Removed parts are:
QTY
1
1
1
1
3
Discarded
x
Retained
-
When the retained check box is check, the parts must be retained
and returned in accordance with the usual warranty procedure to
be reimbursed,
QTY
0.33
Note:
N32989 SEALANT BUTYL 757)
0.33 bottle/Bus
32 bottle for the entire campaign
Client
New York City Transit - New York
New York City Transit - New York
Order
LA76
LC32
Road numbers
8564
8633
8634
8754
VIN
L82J8K9777144
L82J4K9777075
L82JXK9777145 L82J5K9777277
QTY Lang. Customer Target market Plant Config moteur Model
E
US
TD
40
70
NYCT
PLB
121
E
US
TD
40
NYCT
PLB
Jean-Nicolas Fournier
NR
x
x
R1
Digitally signed by Jean-Nicolas Fournier
DN: cn=Jean-Nicolas Fournier, o=Nova Bus,
[email protected], c=CA
Date: 2020.08.26 11:51:20 -04'00'
Service Instruction
QJ 7621- 2085 – Curbside Exterior Mirror Loose and Water Intrusion
GENERAL INFORMATIONS
Document
Curbside exterior mirror
loose and water intrusion
REV
1
Date
6/23/20
Order Affected / Effectivity
LA73, LA76, LB78, LC32
Road Number
8504-8754
By
J. Vaughan
Customers
NYCT
QTY
251
SYSTEM and PARTS:
System Name
Option
Drawing
Part
Exterior mirror
518112.74, 518112.82
518112NB20, 518112NB22
N90681, N78549
Reason for Modification / Background:
1. Inspect the presence of water traces inside the bus, the condition of the gasket and the torque of the hardware
39Nm. If anything wrong is found, go to level 2.
2. Remove the mirror, replace the gasket by a new one, reapply the butyl according to Nova’s guidelines and
reassemble the hardware to the correct torque of 39 Nm
Cause of Failure:
Workmanship issue when exterior mirrors were being removed to paint the bus and not installed back on according to
the installation instructions
MATERIAL
BOM for Mirror N90681 (L959, LA23, LA73, LA76-1to55, LB29/99, LB59, LB78
Item
QTY
PART NO
REV
LEVEL 1 – No parts
LEVEL 2
1
1
N65176
2
1
N32989
3
1
N35120
4
3
N11243
DESCRIPTION
REPLACES
PART N°
Gasket (needed for both types of mirrors)
Sealant Butyl
Spacer 7.9mm
Nut Locknyl M10 YZ TRIV 96H G8
same
same
BOM for Mirror N78549 (LA76-56to125 and LC32)
Item
QTY
PART NO
LEVEL 1 – No parts
LEVEL 2
1
1
N65176
2
1
N32989
3
1
N91045-01 or 02 or 03
4
3
N11243
REV
DESCRIPTION
REPLACES
PART N°
Gasket (needed for both types of mirrors)
Sealant Butyl
Spacer 1/4" or 3/8’’ or ½’’
Nut Locknyl M10 YZ TRIV 96H G8
same
same
same
same
Type
Inspection, torque
Removal, replacement, reapplication, torque
SRT
Time
15 minutes
30 minutes
SPECIAL INSTRUCTION / IMPORTANTE NOTICE
No
1
2
3
Tools Needed:
Torque wrench
Socket
Torque seal
Important notices
LA73 (8504-8507) exterior mirror N90681
LA76-01 to LA76-55 (8508-8563) exterior mirror N90681
LA76-56 to LA76-125 (8564-8633) exterior mirror N78549
LB78 (8526) exterior mirror N90681
LC32-01 to LC32-121 (8634-8754) exterior mirror N78549
DESCRIPTION / WORK INSTRUCTION
Level 1
1.
Locate the curbside exterior mirror
2.
Inspect for presence of water traces inside the A pillar. If water found, go to level 2
Service Instruction
QJ#: 7621-2085
3.
Visually nspect the condition of the gasket. If gasket is damaged, go to level 2
8615 = LA76-107
8744 = LC32-111
4.
If no issues identified with water intrusion or gasket, torque 3x hardware to specification of 39 ± 5
Nm (28.8 ± 3.4 ft lbs) using a torque wrench and socket. Apply torque seal. Level 2 is not
needed.
Service Instruction
QJ#: 7621-2085
Level 2
5.
6.
For the mirror N78549 only : Make sure that the hardware is torqued to 39 N.m.
Measure the gap between the front shell and the metallic mirror support :
Service Instruction
QJ#: 7621-2085
7.
Use the table below to select the new neoprene spacer to be used:
8.
Remove the mirror using the socket wrench. Discard the used locknuts.
9.
Replace the gasket N65176, neoprene spacer (N35120 for mirror N90681; N91045-01/02/03 for
mirror N78549) and locknuts N11243 with new ones.
Service Instruction
QJ#: 7621-2085
N65176
N90681
N65176
N78549
10. Reapply butyl N32989 on the perimeter and around the holes on both surfaces on the gasket
N65176 and N35120 (for mirror N90681) or N91045 (for mirror N78549)
Service Instruction
QJ#: 7621-2085
Incorrect application of butyl (complete layer)
Correct instruction to apply butyl
11. Reinstall the mirror using the same hardware. Torque hardware to 39Nm and add torque seal
Service Instruction
QJ#: 7621-2085
Service Instruction
QJ#: 7621-2085