Chevrolet 10 Series 1970 Service Manual page 226

REAR SUSPENSION AND DRIVE LINE 4 -5 0
TANDEM AND POWER DIVIDER (EATON)
......................................
General D es crip tio n
Maintenance and Adjustm ent ..........................................
Rearward Rear A x l e ...................................................
Forward Rear A x l e ........................................................
Service O p e ra tio n s............................................................
Inter—A x le D ifferential Lock Shift System
................................... ........
Vacuum O p e r a t e d
O p e r a tio n ..............................................................
Checking fo r L e a k a g e ................................................. .............
The tandem re a r axle installation (fig . 87) consists o f
a rea rw ard re a r axle (Eaton M odels 30R and 34R) and a
forw ard re a r axle (Eaton M odels 30D and 34D) which
c a r r ie s a single speed p ow er d ivid er with an in ter-a x le
d ifferen tial. An a ir o r vacuum operated shift mechanism
is used to lock out the in te r-a x le d ifferen tia l to provide
positive d rive to both axles when required.
D rive is transm itted fro m the transm ission through a
conventional p r o p e lle r shaft to the pow er d ivid er input
shaft (fig . 88). The input shaft supports the in ter-a x le
d iffere n tia l which tran sm its equal d rivin g fo r c e to two
h e lica l gears, one mated to a gear on the forw a rd rea r
axle pinion shaft to d riv e the forw ard axle and the other
DRIVE LINE
INDEX
Page
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............. 4-51
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............. 4-51
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4-51
4-51
............. 4-51
4-51
GENERAL DESCRIPTION
F ig . 87—Tandem Rear A x le and Power D iv id e r
Solenoid Lock V a l v e ......................................
Locking C y lin d e r ........................................
A ir Operated ...................................................
Operation ..........................................................
.............................
Checking fo r Leakage
........................
C ontrol Valve
A ir Shift C y l i n d e r ...............................................
D ifferential Lockou t ....................................
Rem oval and In sta lla tion .................................
mated to a gear on the p ow er d ivid er output shaft to
transm it d rive fo rc e through an in te r-a x le p ro p e lle r
shaft to the rearw a rd axle.
tim es, so the in te r-a x le d ifferen tia l (3rd d iffere n tia l) is
provided to allow d ifferen tia l action between the two
axles. When extra traction is requ ired to m ove the v e ­
h icle, the in te r-a x le d ifferen tia l can be locked out so
equal pow er can be d elivered to each axle.
switch in the d r iv e r 's com partm ent actuates the solen oid-
controlled, vacuum operated, lock-out shift le v e r at the
axle. The a ir system is con trolled by a le v e r operated
va lve in the d r iv e rs com partm ent. A ir p ressu re actuates
a shift cylin der which is mounted on the axle. Both sys-
Both a xles d rive at all
A toggle
CHEVROLET TRUCK SERVICE MANUAL