SB-17730-260-A Service Bulletin/Repair Instructions

,,
HJ TECHNICAL
®PROCEDURE

Hendrickson IFS Independent

Front Suspension for Spartan

Motorhome Chassis

SUBJECT: Service Instructions

LIT NO: 17730-260

DATE: July 2013

REVISION: B
ltij:lli.11.JHMltW

Section 1
Introduction, ......... , . , , .. , .. , . , .. , ... 2
Section 2
Product Description .... , .. , .... , .. , .... , 2
Section 3
Important Safety Notice ..... , .... , .. , , , , 4
Section 4
Parts List .. , , .. , ........... , . , , .... , ... 8
Section 5
Special Tools ... , ..... , ............. , .. 11
Section 9
Component Replacement, .. , . , ..... , ... 39

Fasteners ... , .. , .. , .. , . , .. , , , . , .... , ... 39

Air Spring , . , .. , . , , . , ... , , ......... , .... 39

Mechanical Height Control Valve .... , .. , .. , . 40

Shock Absorber .................. , .... , , . 41

Hub Assembly, .... , ............. , .. , . , . , 42

Hubcap .................... , .. , , , ...... 45
Section 6
Towing Procedure . . , .. , .. , , . , .. , .. , .... 14
Section 7
Preventive Maintenance ..... , ....... , .. 15
Kingpin Preparation And Measurement .. , ... 47
Component Inspection ........... , . , ...... 15

Lubrication Intervals ... , .. , .. , .... , .. , , . , . 16
Kingpin Bushing Removal ............ , . , . 49

Steering Knuckle Bore Measurement .. , .. , .. 50
Kingpin Lubrication ....... , .. , ............ 16
Kingpin Bushing Installation, , . , .. , .... , ... 50
Tie Rod End Lubrication ................... 17
Kingpin Bushing Reaming ...... , .. , ...... 51
Tie Rod End Inspection . , . , .......... , , .... 17
Kingpin Seal Installation .. , ............... 52
Steering Knuckle , ....... , .......... , .... 46
Tire Inspection ..... , , ............ , ...... 19
Steering Knuckle Assembly .......... , , .... 52
Shock Absorber Inspection .. , ... , . , , , ...... 21
Upper Control Arm ....................... 54
Wheel Bearing End Play Inspection. , , , , ...... 23
Upper Control Arm Bushing Replacement .. , ... 56

Upright Kingpin Assembly . , ........ , .. , . , , . 57
Upper And Lower Control Arm Bushing Inspection 23

Kingpin Bushing Inspection. , , ........ , ..... 24
Upright Bearing Replacement .. , .. , . , , .. , ... 58

Lower Control Arm .. , .. , .. , . , .. , , .. , ..... 59
Steering Knuckle Inspection ........ , .. , .. , . 25
Section 8
Cradle Gusset ..... , .. , , ................. 61
Alignment &Adjustments, ....... , ...... 26
Cradle Assembly ......................... 61
Alignment Definitions ..................... 26

Inspection Prior To Alignment , .. , ....... , ... 28
Cradle Belly Plate ................... , .... 64
Front Wheel Alignment .. , ......... , ... , . , , 29
Steering Gear ................. , , . , ...... 65
Camber Adjustment .... , , .. , ....... , ..... 30
Pitman Arm . , .. , .... , ...... , . , .. , ...... 65
Single Ride Height Verification .............. 31
Tie Rod End And Cross Tube . , ... , .......... 66
Dual Ride Height Verification (If equipped) ..... 33
Section 10
Plumbing Diagram .. , ..... , . , .. , , ..... 68
Steering Stop .. , ... , ..... , ....... , ...... 35
Section 11
Front Wheel Alignment Specifications .. , . 69
Wheel Bearing Adjustment ... , .......... , .. 36

Toe Setting .................. , , . , ..... , . 37
Section 12 Torque Specifications ... , ..... , ........ 70

Section 13 Troubleshooting Guide .... , , . , , ........ 72

Section 14
Reference Material, . , , .. , .............. 74
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Parts list
8
17730-260
'H

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Hendrickson IFS for Spartan Motorhome Chassis
KEY NO. PART NO.

1

2

3

4

5

6

7
68348-002L

22962-011

17700-010

22962-001

17700-031

70645-002
8

9

10

11

12

13

14

15
66414-003

66414-004

22962-028

49983-000

59428-006

59429-002

59169-000

58035-001

22962-015

66414-006
16

17

18

19

20

21

22

23

24

25

26

27

28
59428-004

56935-001

22962-028

49983-000

59169-000

17491-011

22962-029

59016-000

68352-001

66153-003L

50764-016

22962-001

17700-033
29
58900-084

58900-083
Nol Shown
Nol Shown
30

Nol Shown
31

32

33

34

35

Nol Shown
36

37

Nol Shown
38

39
60904-002

60904-001

60961-039

59156-000

58937-000

58909-000

60961-042

64256-000

60259-002

60259-001

58910-001

60236-001

60937-000

60238-001

67102-000

68370-001

68370-002
40

a

b

41

42

43

44

45
46

47
68365-001

68365-002

33117-000

68367-000

68363-000

68369-000

68368-000
68362-001

68362-002
17730-260
DESCRIPTION
NO.REQ.
AirSQring

W' Hardened Washer

W'-13 UNC Locknut

%" Hardened Washer

%"-16 UNF Locknut

Air SQring SQacer

Mechanical Height Control Valve,

Includes Key Nos. 8-9

LH - 12.6K/14.6K

RH - 12.6K/14.6K (if eguiQQed)

1.4'' Hardened Washer

1.4''-20 UNC Locknut

HCV Linkage

Link Mount

Link Mount Stud

%"-16 UNC Bolt - 1.0"

%" Hardened Washer

Electronic Height Control Valve (if equipped),

•Available for 14.6K Dual CaQacity Only

HCV Linkage

1.4''-20 UNC Hex CaQ Screw

1.4'' Hardened Washer

Yl-20 UNC Locknut

5M'-18 UNC Link Mount Stud

sM'-18 UNC Nut

5M' Hardened Washer

5M'- l 8 UNC Locknut

Electronic Height Control Valve Bracket

Shock Absorber

%"-10 UNC Bolt - 4.0"

%" Hardened Washer

%"-1 0 UNC Locknut

Lower Steering Knuckle Assembly

LH

RH

Upper Steering Knuckle Assembly

LH

RH

Kingpin Bushing and Bearing Service Kit,

Includes Key Nos. 31-37 and Loctite

Grease CaQ Assembly

Retaining Ring

KingQin Bushing

Roller Thrust Bearing Service Kit, One Side

Includes Key Nos. 34-37 and Loctite

Roller Thrust Bearing

Kingpin Shim - 0.047"

KingQin Shim - 0.005", As needed for service

KingQin Seal, ReQlaces 589 70-000

%"-11 UNC Socket Head CaQ Screw

Loctite® (Red) ComQound Tube

W'-13 UNC Sguare Head Bolt

W'-13 UNC Hex Nut

Upright Assembly

LH, Includes Key Nos. 40a, 41-45

RH, Includes Key Nos. 40b-45

Upright Kingpin Assembly

LH

RH, not shown

Grease Fitting

Bearing Preload SQacer

TaQered Roller Bearing

Seal S(;!acer

SealWiQer

Upper Control Arm Assembly,

Includes Key No. 48

RH Front/LH Rear

LH Front/RH Rear
KEY NO. PART NO.
2

4

4

12 3 4 5

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