Special Tools
DescriptionPart NumberQty.
AIR SUSPENSION PUMP AND GAUGE
HD-34633
1

General
See Figure 1. All models feature air-adjustable rear suspension. Air pressure in the rear shocks may be adjusted to suit load requirements, riding style and personal comfort.
NOTE
These are recommended starting points. Adjust to suit load conditions, riding style and comfort desired. Less initial pressure does not necessarily result in a softer ride. Using pressures outside the recommended loading range will result in a reduction of available suspension travel and reduced rider comfort.
Table 1. Standard Rear Suspension Recommended Air Pressure: FLHR/C, FLHT/C/U and FLTR
SHOCK LOAD
TOTAL WEIGHT
PRESSURE
LB.
KG
PSI
kPa
Solo rider
up to 150
0-68
0
0
Solo rider
150-200
68-91
0-10
0-69
Solo rider
200-250
91-113
5-15
35-103
Rider with passenger weight of
up to 150
0-68
10-15
69-103
Rider with passenger weight of
up to 200
0-91
20-25
138-172
Maximum GVWR
see label
20-35
138-241
Table 2. Low Profile Rear Suspension Recommended Air Pressures: FLHRS and FLHX
SHOCK LOAD
TOTAL WEIGHT
PRESSURE
LB.
KG
PSI
kPa
Solo rider
up to 160
0-73
0-5
0-35
Solo rider
160-200
73-91
0-10
0-69
Solo rider
over 200
91
5-10
35-69
Rider with passenger weight of
up to 150
0-68
20-30
138-207
Rider with passenger weight of
over 150
over 68
25-35
172-241
Maximum GVWR
see label
40-50
276-345
Adjusting Shock Pressure
See Figure 1. To adjust the rear shock air pressure, use an air pump to fill or release air from the air valve located just below the frame cover on the left side of the vehicle.
NOTICE
Do not exceed maximum air pressure for suspension. Air components fill rapidly. Therefore, use low air line pressure. Failure to do so can result in possible damage to components. (00165b)
NOTE
An AIR SUSPENSION PUMP AND GAUGE (Part Number:HD-34633) is available at your Harley-Davidson dealer.
WARNING
Use caution when bleeding air from the suspension. Moisture combined with lubricant may leak onto the rear wheel, tire and/or brake components and adversely affect traction, which could result in death or serious injury. (00084a)
NOTE
  • Do not exceed max GVWR or GAWR.
  • ON FLHRS AND FLHX MODELS: Always clear the line by adding 3-5 psi (21-35 kPa) before releasing air from the pump's valve, but do not exceed 50 psi (345 kPa).
  • ON ALL BUT FLHRS AND FLHX MODELS: Always clear the line by adding 3-5 psi (21-35 kPa) before releasing air from the pump's valve, but do not exceed 35 psi (241 kPa).
Figure 1. Rear Air Suspension Air Valve