NHTSA ID Number: 10146189
Manufacturer Communication Number: OM-H757-Rev C
TSB/Document Date: 2018-10-29
Summary
Operation Name: Hendrickson
Auxiliary Axle Systems Document Name: Owner's Manual - Non-Steerable Auxiliary Lift Axle Systems - Operation and Preventive Maintenance Procedures Summary: This document provides operation and preventive maintenance instructions for Hendrickson COMPOSILITE FX, TOUGHLIFT FM and TOUGHLIFT FR non-steerable auxiliary lift axle systems.
Verify end play is between 0.001" and 0.005"
adjust as required, and grease or oil
3,000 mi.
20,000 miles or 10 months, whichever comes first
Inspect for leaks, inspect brake chamber
components for wear
5,000 miles or every 2 months, whichever comes first
Inspect seals for leaks
NOTE: If the hub or drum are removed for
service, wheel seals will require replacement.
5,000 miles or as needed, whichever comes first
Verify torque
5,000 mi.
Pivot Connections
HENDRICKSON RECOMMENDED LUBRICATION SPECIFICATIONS
COMPONENT
NLGI-1 or NLGI-2 grease; GL-5 gear lubricant
FAILURE TO LUBRICATE THE WHEEL BEARINGS CAN RESULT IN COMPONENT DAMAGE, BODILY INJURY OR DEATH.
OM-H757
11
Preventive Maintenance
Owner’s Manual – Non-steerable Auxiliary Lift Axle Systems
SECTION 6
Air Pressure Load Information
The air pressure load chart(s) on the following pages are intended to assist vehicle owners, operators, and
fleet managers (i) to estimate the lift axle air system pressure necessary to support a particular target lift
axle load, and (ii) to meet applicable federal, state/provincial and/or local vehicle weight regulations.
The air pressure load chart(s) list estimated lift axle air system pressure requirements based upon particular sets of:
1. Ride air spring extension measurements (refer to Figure 6-1);
2. Axle lift measurements (refer to Figure 6-1); and
3. Target lift axle loads.
The estimated lift axle air system pressure requirements listed in the air pressure load chart(s) are applicable to a range of lift axle ride heights and tire sizes intended for Hendrickson non‑steer lift axle applications.
The actual lift axle air system pressure needed to support a particular target lift axle load may vary depending upon the above-referenced parameters, as well as vehicle and lift axle configuration, operation, payload,
service and other factors. If necessary, vehicle operators should use appropriate truck/trailer weight scale
equipment to measure actual lift axle loads.
NOTE
Any/all penalties incurred from improperly loaded vehicles or improperly installed, modified, operated,
serviced or maintained lift axle systems are the sole responsibility of the vehicle owner, operator, and/or
fleet manager. Hendrickson Auxiliary Axle Systems shall not be responsible for any such penalties or any
damage or other adverse effects on vehicle and/or lift axle form, fit, or function due to any such improper
activity. Refer to the current version of Hendrickson Publication No. TP-H621 for proper lift axle installation
and additional service, repair, and rebuild instructions.
NOTE
It is the responsibility of the vehicle owner, operator, and/or fleet manager to ensure the vehicle and lift
axle(s) comply with all applicable federal, state/provincial and/or local weight, dimension and configuration regulations under loaded and unloaded conditions. Consult your appropriate regulatory and/or law
enforcement authorities to determine how such regulations may (i) vary by operating location, and (ii)
apply to your particular vehicle, lift axle(s), and applications.
HOW TO MEASURE RIDE AIR SPRING EXTENSION AND AXLE LIFT
PRIOR TO AND DURING DEFLATION AND INFLATION OF THE AIR SUSPENSION SYSTEM, ENSURE THAT ALL
PERSONNEL AND EQUIPMENT ARE CLEAR FROM UNDER THE VEHICLE AND AROUND THE SERVICE AREA, FAILURE
TO DO SO CAN CAUSE SERIOUS PERSONAL INJURY, DEATH, OR PROPERTY DAMAGE.
FIGURE 6-1
Air Pressure Load Information
12
OM-H757
Owner’s Manual – Non-steerable Auxiliary Lift Axle Systems
AIR PRESSURE LOAD CHARTS
10.5"
11.0"
11.5"
12.0"
12.5"
13.0"
13.5"
14.0
14.5"
6.0"
6.5"
7.0"
7.5"
8.0"
8.5"
9.0"
9.5"
10.0"
5,000
32
33
34
35
37
38
40
42
45
5,500
35
37
38
39
41
43
45
47
50
6,000
39
40
42
43
45
47
49
52
55
6,500
43
44
45
47
49
51
54
57
60
7,000
46
48
49
51
53
55
58
61
65
7,500
50
51
53
55
57
60
62
66
70
8,000
53
55
57
59
61
64
67
70
74
8,500
57
59
61
63
65
68
71
75
79
9,000
61
63
65
67
69
72
76
79
84
9,500
64
66
68
71
73
76
80
84
88
10,000
68
70
72
75
77
80
84
88
93
AXLE LOAD (in pounds)
*RIDE AIR SPRING
EXTENSION (in inches)
ESTIMATED AIR SYSTEM PRESSURE
REQUIREMENTS (in PSI)
COMPOSILITE FXT 8K • FXT 10K
10.5"
11.0"
11.5"
12.0"
12.5"
13.0"
13.5"
14.0"
14.5"
6.0"
6.5"
7.0"
7.5"
8.0"
8.5"
9.0"
9.5"
10.0"
AXLE LOAD (in pounds)
*RIDE AIR SPRING
EXTENSION (in inches)
5,000
30
31
32
33
35
36
38
40
43
5,500
34
35
36
37
39
41
43
45
48
6,000
37
39
40
41
43
45
47
50
53
6,500
41
42
44
45
47
49
52
54
58
7,000
45
46
48
49
51
54
56
59
63
7,500
48
50
51
53
55
58
61
64
67
8,000
52
53
55
57
59
62
65
68
72
8,500
55
57
59
61
64
66
69
73
77
9,000
59
61
63
65
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TSB/Document ID: OM-H757-Rev C
Replacement Service Bulletin Number:
MFR Communication Date: 2018-09-01
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: STEERING
MFR Component System:
MFR Component Subsystem:
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