☞NOTE:

Contact New Flyer Parts for information on
the grease gun kit with special adapters
and grease cartridge.

1.6.2.

Compressor Tip & Dust Seal
Replacement

1. Remove the scroll compressor assembly
from the vehicle. Refer to Section 8 of your
New Flyer Service Manual for removal procedure.

1. Remove V-belts and fan cover.

2. Remove the hardware from fixed scroll
assembly and separate from orbital scroll
assembly. See “Fig. 4: Scroll Compressor
Assembly” on page 5.

2. Remove air end pulley and cooling fan
using a gear puller.

3. Remove old seal. Clean scroll using a
clean cloth and compressed air.

☞NOTE:

3. Remove the duct shroud.
4. Remove three grease caps. Do not attempt
to loosen or tighten bolt.
5. Grease all three crank bearings. Deliver
seven full pumps of grease to each grease
fitting. See “Fig. 3: Crank Pin Bearing
Lubrication” on page 4.
6. Reinstall all removed parts.

Tip seals for fixed scroll and orbital scroll
have opposing seal cut angles. To distinguish between fixed scroll and orbital scroll
seals. See “Fig. 5: Seal Identification” on
page 6.
4. Insert tip seal with lip of the seal (grooved
bottom) facing bottom of scroll seal groove.
Ensure lip faces center of scroll. See “Fig.
6: Orbital Scroll Seal Installation” on
page 6.

During seal installation, it is important
to verify that a notch in the seal has
been achieved. Follow the procedures
carefully to prevent seal movement during installation.
5. Insert a new high pressure tip seal from
the center of the orbital scroll as follows:
a. Make sure there is no gap at the tip,
and that the low pressure seal contacts
the high pressure seal inside the scroll
groove.
*5($6(),77,1*6
)25&5$1.3,1
%($5,1*6

b. Insert approximately half of the low
pressure seal and then remove it to verify that a notch in the seal has been
achieved. See “Fig. 7: Seal Installation”
on page 6.
s0700407a.svg

Fig. 3: Crank Pin Bearing Lubrication

c. Reinstall the portion of the seal
removed previously and complete the
installation of the remainder of the seal.
6. Repeat steps 4 & 5 for fixed scroll seal.
7. Remove the dust seal and backup tube on
outermost side of fixed scroll set.

4 of 8

The New Flyer vehicles described in this manual may be protected by one or more
patents and design applications or registrations in the United States and Canada,
and in other countries. Refer to “Vehicle Patent Information” in this manual.
Copyright © 2019 New Flyer Industries Canada ULC

SMB-188

SERVICE MANUAL BULLETIN
SMB-188
8. Insert new backup tube in fixed scroll set.
Orient split in tube to the 6 o’clock position.
See “Fig. 8: Backup Tube Installation” on
page 6.
9. Insert new dust seal on backup tube. Face
seamed section of dust seal at the 3
o’clock position. See “Fig. 9: Dust Seal
Installation” on page 7.

10.Reassemble fixed scroll set to orbital
scroll.
11.Install and lightly tighten the six retaining
fasteners. Rotate crankshaft and confirm it
rotates smoothly.
12.Torque the fasteners in two stages.

☞NOTE:

❒ First Stage - 17 in-lb.
❒ Second Stage - 265 in-lb.

DO NOT allow dust seal or tip seal to fall
out of position during installation.
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25%,7$/6&52//
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25%,76&52//
7,36($/
/2:35(6685(
),;('6&52//
7,36($/
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),;('6&52//

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25%,76&52//
7,36($/
+,*+35(6685(
),;('6&52//
7,36($/
s0700575a.svg

Fig. 4: Scroll Compressor Assembly

SMB-188

The New Flyer vehicles described in this manual may be protected by one or more
patents and design applications or registrations in the United States and Canada,
and in other countries. Refer to “Vehicle Patent Information” in this manual.
Copyright © 2019 New Flyer Industries Canada ULC

5 of 8

SERVICE MANUAL BULLETIN
SMB-188

/,3
,16,'(

/,3
%277206,'(

),;('6&52//

25%,76&52//

0$&+,1('
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/()7

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5,*+7

s114302b.svg

Fig. 5: Seal Identification

s114314a.svg

Fig. 7: Seal Installation

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,16,'(

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s114313a.svg

Fig. 6: Orbital Scroll Seal Installation

6 of 8

s114310a.svg

Fig. 8: Backup Tube Installation

The New Flyer vehicles described in this manual may be protected by one or more
patents and design applications or registrations in the United States and Canada,
and in other countries. Refer to “Vehicle Patent Information” in this manual.
Copyright © 2019 New Flyer Industries Canada ULC

SMB-188

SERVICE MANUAL BULLETIN
SMB-188
1.6.3.

Heat Insulation Pipe Replacement

1. Set the Battery Disconnect switch to the
OFF position.
2. Drain the vehicle air system.
3. Disconnect the discharge lines and fittings
from the long nipple on the compressor.
4. Unthread the long nipple from the compressor housing. See “Fig. 10: Heat Insulation Pipe” on page 7.
5. Pull out the heat insulation insert.

+($7
,168/$7,21
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/21*1,33/(

2 &/2&.
326,7,21

s0700379b.svg

Fig. 10: Heat Insulation Pipe

'8676($/

s114309a.svg

Fig. 9: Dust Seal Installation

SMB-188

The New Flyer vehicles described in this manual may be protected by one or more
patents and design applications or registrations in the United States and Canada,
and in other countries. Refer to “Vehicle Patent Information” in this manual.
Copyright © 2019 New Flyer Industries Canada ULC

7 of 8

SERVICE MANUAL BULLETIN
SMB-188
2.

FLUID & LUBRICATION
GUIDE

2.1.

Lubrication Chart

FLUID & LUBRICATION GUIDE
ITEM

COMPONENT

PROCEDURE

INTERVAL

LUBE TYPE

1

Orbital Scroll
Bearing

Lubricate Grease
Fittings

Yearly

Powerex Grease

2

Crank Pin Bearing

Lubricate Grease
Fittings

250,000 mi. (402,330 km)
(10,000 hrs.)

Powerex Grease

8 of 8

The New Flyer vehicles described in this manual may be protected by one or more
patents and design applications or registrations in the United States and Canada,
and in other countries. Refer to “Vehicle Patent Information” in this manual.
Copyright © 2019 New Flyer Industries Canada ULC

SMB-188