Spicer Tandem Drive Axles Service Manual D__R440, 460, 480, D_R461, 462, 463, 521, 581, 601, 651, 652, 653 - Manual (Page 5)

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General Information
General Information
Introduction
Dana Corporation, Axle & Brake Division, presents this publi-
cation to aid in maintenance and overhaul of Dana tandem
drive axles. Instructions contained cover the models listed.
Their design is common, with differences in load capacity. Ca-
pacity variations are achieved by combining basic differential
carrier assemblies with different axle housings, axle shafts and
wheel equipment.
The suffix letter “P” in the model number indicates lube pump
is standard. Pump models are equipped with a gerotor pump,
designed to provide additional lubrication to the inter-axle dif-
ferential and related parts.
Carrier Design and Identification
(DT440-P, DT460-P, DT480-P and DP440-P through DP650-
P)
On August 1, 1981, these axles were converted to a new con-
figuration which includes redesign of the axle differential car-
rier; input shaft bearing, involute side gear and axle shaft spline
configuration. For carrier identification, see illustrations:
Axles built after August 1, 1981 with Carrier Casting No.
110500
Axles built before August 1, 1981 with Carrier Casting No.
103530
Note: Refer to Dana Parts Book AXIP-0108 for parts informa-
tion.
Input Shaft
Input shaft with Carrier Casting 110500 is equipped with a ta-
pered roller bearing. Casting 103530 uses a ball bearing.
Input Shaft Bearing Spacer
Used only with Carrier Casting 110500.
Pinion Bearing Sleeve
Used only with Carrier Casting 103530.
Pinion Helical Gear Spacer
Used only on DT/DP440-P and DT/DP460-P (ratios 3.90-6.17).
Output Shaft Rear Bearing Retaining Washer
Used only on DT440-P - DT485-P and DP440-P - DP650-P.
Lube Pump Drive Shaft
The drive shaft on early pump design is equipped with a woo-
druff key. On late pump design, the key is eliminated. The drive
shaft end has two machined flats and the drive gear mounting
hole is shaped to accommodate these flats.