LI1860ER1

INFORMATION LETTER
REFERENCE:
Nova Bus Manuals
SECTION:
99 General Practices
RS NO:
–
EFFECTIVE IN PROD.:
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SAV.1E.2012MA
LI1860ER1
APPLICATION DEADLINE:
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SUBJECT:
Breeze Clamps
JUSTIFICATION:
Information concerning the positioning and the tightening of breeze clamps on silicone
hoses.
LEVEL
1
DIRECT CHARGES
DESCRIPTION
Where necessary, position and tighten breeze clamps according to
the procedure included in this document.
2
TIME
LABOUR
MATERIAL
Client
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MATERIAL
QTY
PART NO
REV.
DESCRIPTION
REPLACES PART N°
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–
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LEVEL 1
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LEVEL 2
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DISPOSAL OF PARTS
REMOVED PARTS ARE:
DISCARDED
RETAINED
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REVISION HISTORY
REV.
DATE
NR
2012MA16
Initial release
Danielle Lacroix
R1
2012DE03
Specifications modified, and installation steps added.
Danielle Lacroix
APPROVED BY:
CHANGE DESCRIPTION
Karine Allonce
Digitally signed by Karine Allonce
DN: cn=Karine Allonce, o=Novabus, ou,
[email protected], c=CA
Date: 2013.01.11 11:43:26 -05'00'
WRITTEN BY
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INFORMATION LETTER
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WARNING
Follow your internal safety procedures.
PROCEDURE
1.1. Ensure the proper positioning of the clamp on the hoses according to the specifications in Figure 1. The clamp
must be over the hose, perpendicular to the hose/piping assembly, at a minimum of 1/16 inch (1.6 mm) from
the end of the hose, and before the fitting/piping bead. See Figure 2 for the installation steps.
Clamp
Tube end
Bead
Hose
1/16 in. min.
(1.6 mm min.)
1/8 in. min.
(3 mm min.)
max. 1/16 in.
(max. 1.6 mm)
Figure 1 - Specifications for the Installation of Breeze Clamps
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Step 1: Place the clamp on the hose and tighten until you feel a
slight resistance while moving the clamp along the hose...
Step 2: ...but not able to go further than the beginning of the bead.
Step 3: Move the clamp back at least 1/8 in. (3 mm). Make sure
there is at least 1/16 in. (1.6 mm) from the edge of the
hose to the edge of the clamp.
Specifications:
1/16 in. min.
(1.6 mm min.)
1/8 in. min.
(3 mm min.)
Figure 2 - Steps for the Installation of the Clamps
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INFORMATION LETTER
NOTE
Never use an impact wrench to tighten the clamps. It is recommended to use a pneumatic ratchet wrench
or power tools tensor.
1.2. Tighten Belleville-type breeze clamps according to the values indicated in Figure 3.
Screw length
Tightening torque
Initial*
Retorquing**
1 ⅞ in.
(47,5 mm)
66 ± 4 lb-in.
(7,5 ± 0,5 N•m)
35 ± 2 lb-in.
(4 ± 0,25 N•m)
2 ½ in.
(63,5 mm)
115 ± 9 lb-in.
(13 ± 1 N•m)
62 ± 4 lb-in.
(7 ± 0,5 N•m)
* If a clamp was loosened to be repositionned, apply the initial torque, not the retorquing value.
** Retorquing corresponds to a torque value of up to a maximum of 50% of the initial torque in order to avoid damage to
the silicone hose.
Figure 3 - Torque Required for Belleville-Type Breeze Clamps
1.3. After tightening perform a visual inspection of the ‘’Torque check extension’’ (Figure 4). Without confirming the
value of the torque applied, the clamp is tightened when the extension is out of the cylnder and the Belleville
washers are almost flat.
Torque check extension
Screw length
Incorrect
Correct
Belleville washers
Figure 4 - Torque Check Extension Visual Inspection
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INFORMATION LETTER
1.4. Tighten the Aero-Seal and Power-Seal-type breeze clamps according to the values indicated (Figure 5). 
Tightening torque
Initial*
Retorquing**
35 ± 4 lb-in.
(4 ± 0,5 N•m)
18 ± 2 lb-in.
(2 ± 0,25 N•m)
* If a clamp was loosened to be repositionned, apply the initial torque, not the retorquing value.
** Retorquing corresponds to a torque value of up to a maximum of 50% of the initial torque in order to avoid damage to the silicone
hose.
Figure 5 -Torque Required for Aero-Seal and Power-Seal-Type Breeze Clamps (5/16 in. or 8 mm)
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