Manual
AXAG-0200 June 2009 68
Tridem Structural Ratings
Housing Dimensions
Drive Axle Model
Housing Box Section
(H x W x T)
Spindle Diameters
(Inner/Outer)
Notes
Spindle
Type
Standard Track Wide Track
T60-174 5.24 x 4.61 x .50 5.24 x 4.61 x .50 3.750 / 3.250 5
R
TD583-P 5.24 x 4.61 x .56 5.24 x 4.61 x. 56 3.750 / 3.250
T69-170HP 5.24 x 4.61 x .63 5.24 x 4.61 x .63 3.750 / 3.250
T78-190P, T78-590P 5.91 x 5.31 x .63 5.91 x 5.31 x .63 3.750 / 3.250
Gross Axle Ratings Based on the Use of Wide Track Housings (lb.)
(See Note 1)
Housing Box Section (in.) 78 in.Track (Standard) Notes
5.24 x 4.61 x .50 54,000 2
5.24 x 4.61 x .56 58,000 2
5.24 x 4.61 x .63 58,000 2
5.91 x 5.31 x .63 58,000 2
Gross Axle Ratings Based on the Use of Outset Single Wheels (lb.)
Housing Box Section (in.) 78 in. Maximum Track Width 80 in. Maximum Track Width Notes
5.24 x 4.61 x .50 54,000 50,000 2,3
5.24 x 4.61 x .56 58,000 58,000 2,3
5.24 x 4.61 x .63 58,000 58,000 2,3
5.91 x 5.31 x .63 58,000 58,000 2,3
Gross Axle Rating Based on Site Travel Conditions Only (lb.)
(See Note 4)
Housing Box Section (in.)
73 in.Track
(Standard)
78 in.Track
(Single Wheels)
80 in. Track
(Single Wheels)
Notes
5.24 x 4.61 x .50 68,000 65,000 60,000 2
5.24 x 4.61 x .56 70,000 70,000 70,000 2
5.24 x 4.61 x .63 70,000 70,000 70,000 2
5.91 x 5.31 x .63 70,000 70,000 70,000 2
Notes: 1. Track widths
are nominal and may vary with wheel equipment. 72-73 inches is the track width of a tridem
with standard housings.
2. Maximum allowable gross axle weight ratings vary with ratio. See charts on next page for GAWR. Refer
to the specific vocation guideline section for additional information regarding maximum gross weight.
3. All ratings are for standard track width
housings. Track increase over standard is produced by wheel
outset
.
4. Site Travel
: 5 miles per hour maximum speed with liftable axles raised. This condition should not exceed
5% of the total operating miles of the vehicle.
5. The forward rear wide track housing has a .63 in. wall thickness while the two rear most wide track
housings are .50 in. thick.