5,000 mi.

Check bushing for wear and verify torque
5,000 mi. or as needed, whichever comes first

Pivot Connections
Stabilizers

Check for oil leak and adequate return

Lockstraight
Shift Chamber

Verify torque

3,000 mi.

5,000 mi

Grease at install and every 5000 mi thereafter

20,000 mi. or 10 months, whichever comes first

Inspect for leaks, inspect chamber components for wear

HENDRICKSON RECOMMENDED LUBRICATION SPECIFICATIONS
COMPONENT

GREASE

Kingpin

NLGI–1 or NLGI–2 grease

Tie Rod Ends

EP–1 or EP–2 grease

Wheel Bearings

NLGI–1 or NLGI–2 grease; GL–5 gear lubricant

Lockstraight

NLGI–2 grease

FAILURE TO LUBRICATE THE WHEEL BEARINGS CAN RESULT IN COMPONENT DAMAGE, BODILY INJURY OR DEATH.

OM–H754

11

Preventive Maintenance

Owner’s Manual – 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 steerable 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–H633 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–H754

Owner’s Manual – Steerable Auxiliary Lift Axle Systems
AIR PRESSURE LOAD CHARTS
COMPOSILITE SCT/SCB/SCW 8•10
10.5"

11.0"

11.5"

12.0"

12.5"

13.0"

13.5"

14.0"

14.5"

*AXLE LIFT
(in inches)

6.0"

6.5"

7.0"

7.5"

8.0"

8.5"

9.0"

9.5"

5,000

31

32

33

34

35

37

39

41

44

5,500

34

35

37

38

40

41

43

46

49

6,000

38

39

41

42

44

46

48

51

54

6,500

42

43

44

46

48

50

52

55

59

7,000

45

47

48

50

52

54

57

60

64

7,500

49

50

52

54

56

59

61

65

68

8,000

53

54

56

58

60

63

66

69

73

8,500

56

58

60

62

64

67

70

74

78

9,000

60

62

64

66

68

71

74

78

82

9,500

63

65

67

70

72

75

79

83

87

10,000

67

69

71

74

76

79

83

87

91

10.0"

ESTIMATED AIR SYSTEM PRESSURE
REQUIREMENTS (in PSI)

AXLE LOAD (in pounds)

*RIDE AIR SPRING
EXTENSION (in inches)

10.5"

11.0"

11.5"

12.0"

12.5"

13.0"

13.5"

14.0

14.5"

*AXLE LIFT
(in inches)

6.0"

6.5"

7.0"

7.5"

8.0"

8.5"

9.0"

9.5"

10.0"

5,000

31

32

33

35

36

38

40

42

45

5,500

35

36

37

39

40

42

44

47

50

6,000

39

40

41

43

44

46

49

51

55

6,500

42

44

45

47

49

51

53

56

59

7,000

46

47

49

51

53

55

58

61

64

7,500

49

51

53

55

57

59

62

65

69

8,000

53

55

56

59

61

63

66

70

74

8,500

57

58

60

63

65

68

71

74

78

9,000

60

62

64

66

69

72

75

79

83