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

All models feature air-adjustable rear suspension. Air pressure in the rear shock absorbers may be adjusted to suit load requirements, riding style and personal comfort.
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)
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)
  1. Remove the left saddlebag, if present.
  2. See Figure 1. Remove the cap from the air valve located behind the shock absorber on the left side of the vehicle.
    3. NOTE
    • Always add 21–35 kPa (3–5 psi) to the existing pressure before releasing air from the system to prevent oil for exiting the air valve. NEVER exceed 345 kPa (50 psi).
    • Do not exceed maximum GVWR or GAWR.
  3. Refer to Table 1 and Table 2. Attach AIR SUSPENSION PUMP AND GAUGE (Part Number:HD-34633) to the air valve. Fill or release air from the shock absorber to the pressure specified for your model motorcycle and load.
    4. NOTE
    The specified pressures are recommended starting points. Adjust pressure to suit load conditions, riding style and comfort desired. Less 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.
  4. Install cap on air valve and install left saddlebag, if removed.
Figure 1. Rear Air Suspension Air Valve
Table 1. Recommended Suspension Air Pressure: FLHX, FLTRX, FLHR/C
SHOCK LOAD
TOTAL WEIGHT
PRESSURE
LB.
KG
PSI
kPa
Solo rider
up to 150
up to 68
0
0
150-200
68-91
0-10
0-69
200-250
91-113
10-20
69-138
250-300
113-136
20-30
138-206
over 300
over 136
30-50
206-345
Solo rider with capacity luggage of 18 kg (40 lb)
up to 150
up to 68
10-20
69-138
150-200
68-91
20-30
138-206
200-250
91-113
30-40
206-276
250-300
113-136
40-50
276-345
over 300
over 136
50
345
Rider plus passenger
ALL
ALL
40-50
276-345
Maximum GVWR
ALL
ALL
50
345
If Tour-Pak is installed, add 34–69 kPa (5–10 psi) to shock pressure. Do not exceed 345 kPa (50 psi) suspension pressure.
Table 2. Recommended Suspension Air Pressure: FLHTC, FLHTCU, FLHTK, FLTRU
SHOCK LOAD
TOTAL WEIGHT
PRESSURE
LB.
KG
PSI
kPa
Solo rider
up to 150
up to 68
5-10
34-69
150-200
68-91
10-20
69-138
200-250
91-113
20-30
138-206
250-300
113-136
30-40
206-276
over 300
over 136
40-50
276-345
Solo rider with capacity luggage of 32 kg (70 lb)
up to 150
up to 68
25-30
172-206
150-200
68-91
30-40
206-276
200-250
91-113
40-50
276-345
over 250
over 113
50
345
Rider plus passenger
ALL
ALL
50
345
Maximum GVWR
ALL
ALL
50
345
Do not exceed 345 kPa (50 psi) suspension pressure.