Yanmar YM276 Service Manual page 32

10-05.20
Predelivery Service
REAR BALLAST
The amount of rear ballast should permit operation with appmxi-
mately 10 to 15 percent slip o f rear wheels. Maximum drawbar
horsepower is available when operating in this range. Check
slippage as follows:
1. While tractor i s working, count revolutions of rear wheel
between two marks.
2.
Go back with implement raised and count rear wheel revolu-
tions between same t w o marks.
3. Compare the two counts. The firrt should be 10 to
15
percent
larger.
A
-Mark
on wound
1 3 -Mark an whml
4. Check tire tracks oiten.
With too much ballast, tread marks
will be clear and distinct. showing no slippage. With too little
ballast, tread marks will be wiped out by slippage.
A - T o o much ballast
t l -Corrsct
ballart
c
-
TOO
anb
b a h t
Maximum added ballast varies depending upon tire size,
and tractor weight.
A C
331
w
V T o t a l rear
y l e
weight including tractor weight, liquid ballast,
cast Iron we~ghts, and mounted equipment must not exceed
the maximum indicated in the chart below.
SME2760121-8705 YMZ76and Z76D
Kinornoto. Printed in Jawn
r
Maximum Total Rear Axle Weight
Tire
Size
11.2-24 1R1)
12.4-24 1R1)
11.2-24 (R3)
355180D20 1Tufi)
-
ply
Rating
4
4
4
4
Capacity per
a
tractor
1210kg (26681bsl
1210kg 126681br)
1210kg (26681brl
1210kg 126681bsl