ULTIMAAX ® – Kenworth Vehicles
REAR SUSPENSIONS
VEHICLE
VEHICLE
KEY NO. PART NO.
DESCRIPTION
QTY.
KEY NO. PART NO.
DESCRIPTION
QTY.
1
Equalizing Beam Assembly with Shock Bracket 2 Includes Key Nos. 3-5
11
*Progressive Load Spring (PLS)
4
a b
Tractor
78489-540 78489-560 60961-759
54" Beam Length 56" Beam Length
Truck Progressive Load Spring Fasteners Service Kit, One Side
Cross Tube Service Kit, Includes Key No. 2 and Weldable Loose Plug (Not Shown)
34013-196 60961-812
Tractor, Includes Key Nos. 12a-13 Truck, Includes Key Nos. 12b-13
2
44642-008 60961-755
Cross Tube - 1140 mm
1
Equalizing Beam Bushings Service Kit, One Beam , Includes Key No. 3-4, 6-8, 18-20 End Bushing Service Kit, One Wheel End, Includes Key Nos. 4-8 *Bar Pin End Bushing Assembly, Includes Key No. 5a Bar Pin Shim, Standard 0.19" / 0.19" Center Bushing
12
*M10 x 1.5 x 6G Bolt
8
a b
Tractor, Flange Bolt, 40 mm
3
69538-000L 60961-752
2
Truck, Round Head Square Neck Bolt, 35 mm
13 14
*M10 x 1.5 Flange Locknut
8 4
70886-000 34013-197
Saddle Assembly
Saddle Only Fasteners Service Kit, One Side, Includes Key Nos. 15-16
4
5
50130-000 50131-000 57026-000
8
15 16 17
*M20 x 1.5 x 75 mm Flange Bolt
8 8 4
Optional 0.25" / 0.12"
*M20 x 1.5 Flange Nut
Optional flat shim 0.375" End Bushing Fasteners Service Kit, Includes Key Nos. 6-8
77205-001 60961-768
Saddle Cap, Replaces 77374-001
Saddle Cap Fasteners Service Kit, One Side, Includes Key Nos. 18-20
56659-001 56659-005 34013-104
Tandem
18 19 20 21 22
*M16 x 2 x 6g x 180 mm Flange Bolt
8 8 8 4 4
One Beam
*M16 Flat Washer *M16 x 2 x 6h Nut **Shock Absorber Upper Shock Bracket
One Wheel End
6 7 8 9
*1"-8 UNC x 6" Bolt *1" Hardened Washer *1"-8 UNC Locknut
8
60680-015L 78630-001
16
8
Replaces 78630-002 (If equipped)
Upper Shock Fasteners Service Kit, One Beam, Includes Key Nos. 23-24
70912-XXX
Frame Hanger, see Selection Guide below 2 Shear and Progressive Load Spring Service Kit, One Side Tractor, Includes Key Nos. 10, 11a, 12a,13, 15-16, 18-20, 27 Truck, Includes Key Nos. 10, 11b, 12b,13, 15-16, 18-20, 27 Shear Spring Service Kit, One Side Includes Key Nos. 10, 15-16, 18-20, 27 8 Progressive Load Spring Service Kit, One Side *Shear Spring
60961-818
23 24 25
*M16 x 2 x 140 mm Flange Bolt
4 4 2
60961-749
*M16 x 2 Flange Nut
8240-0000-XXX ***Longitudinal Heavy-duty TRAAX ROD ™
60961-771
Assembly, Straddle/Straddle, Specify Length in mm, Replaces 92000-XXXS
60961-750
26 8233-0099-XXX ****Transverse Severe-duty TRAAX ROD Assembly, 2 Straddle/Taper, Specify Length in mm Replaces 92350-605S Not Shown 49689-000L Torque Rod Shim As Req. 27 70867-001 P-80 Lubricant - 10 ml (Not Shown) As Req.
10
60961-751 60961-822
Tractor, Includes Key Nos. 11a, 12a, 13 Truck, Includes Key Nos. 11b, 12b, 13
NOTES: Quantities specified are for the vehicle. Quantities of service kit components may vary from amount shown in the list. * Item included in kit / assembly only, part not sold separately. ** Shock absorbers are mandatory for the tractor applications and optional for truck applications. *** Longitudinal and transverse TRAAX ROD bushings are non-serviceable, the entire torque rod assembly requires replacement. Visit TRAAX ROD website www.traaxrods.com for more information. **** Transverse torque rods are mandatory for the ULTIMAAX rear suspension regardless of axle spacing. HENDRICKSON Lit. Nos. 48422-592 (Tractor PLS 77382-001) and 48422-598 (Truck PLS 78897-001) – ULTIMAAX Gauge Card can be used to measure in unloaded condition (1) the height of the progressive load spring (PLS) and (2) the length of cut / split of the shear spring and PLS available online at www.hendrickson-intl.com/Litform.
■ Frame Hanger Selection Guide Key No. 9 46K lbs. • 52K lbs. Capacity Frame Width ♦ Ride Height ♦♦ Saddle Height Axle Drop
Figure 1
Frame Hanger Part Number Tractor Truck 70912-204 70912-224 70912-205 70912-225 70912-404 70912-424 70912-405 70912-425
17.5"
7"
11"
18.25"
7¾"
34"
18.5"
7"
12"
19.25"
7¾"
♦ For reference only, ♦♦ See Figure 1 for Saddle Height.
451
Reference Lit. No. SP-301 | 1-866-755-5968
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