MAINTENANCE
AND
ADJUSTMENT
Unit: gram (00)
Item Standard
Sliding
resis
tance of Not more than 150 (5.3)
control
rack
as
,tar
ti
ng
pull
(4)
Wear
of
tappets and
roUers
The t.ppet roller consi,ts of roller,
roUer
bushing
and pin. The
overaJl
wear of these th ree
pu
ts is
to be checked by measuring
the
r.dial play
of
the
roller with a dial
gauge
as
illustrated. With the
tappet
su
b-a
ssembly
he
ld
as
.hown, move the ro
Uer
up
and
dow
n
wi
th
a
rod
.
If
a reading greater than
0.3
mm
(0
.
011
8
in
.)
is
oblOined, replace the whole
tappet iub-assembly.
.....
®
,·Dia4
gau9&
,J
·Vise
2-Tappet
~·Rod
Checking
tap~
...
rol
ler tor
Wear
MiI« each tappet
and
tappet bore to determine the
amount
of
radial clearance between the
two,
Replacement
of
wOrn
parts
is
necessary
if
the
clearance
compulc:d
from
micrometer
re.admgs
ex
-
ceeds
the
servi
c-c
limit.
Unit
: mm (in,)
Service
Item
Standard
limrt
Radial clearance
0.02-0
.062
0.25
between "'ppet and
(0.0008-0
.00244)
(0.0098)
lappet bore
,
Check
tbe outside diameter of each roller; if the
,eading
as
referred
to
Ihe
standard O.D.
roveals
a
wear of 0.075
nun
(0.00295 in.) or mor •• replace
Ibe
whole
tap""t sub-a
...
mbly.
Unit:
mm
(i
n.
)
SUlndnrd
Service
Item
limit
l1_~,oo,
0.075
Tap""t
roUer
O.D.
(G,66
9
-~
.
OOOll)
(-O.00295)
(5)
Delivery·vaIve
springs,
p1Wllle,
sprinp
and seats
Spring
s showing
evidence
of
cracking
must
be
68
replaced. Me.sure the free length
of
each spring;
if
the spring is found 10 be shorter
by
-0.5
mm
(-Q.020in.)(plungerspring)or
by
-I
mm (-0.039
in.) (delivery.v.lv. 'pring) than the
smaUest
stand-
ard
length,
rep
la
ce it.
Uni'!
:
mm
(in.)
Item Standard
Silrvice
lim
.'
Pl
u
ng
er
49
+]
-0
- 0.5
Free length
spring
(1
.929
~~
.
039)
(- 0.020)
of spring
De
llvel)'-
v
alve.
32
:1:0.
5
- I
sp
ring
(1.26
±0
.020)
(-0,04)
lrupeel
each
plunger-spring seat; if
the
seal
i.
found to have a
rece
..
(due 10 the seating end of
Ihe
spring)
of
0.1
mm
(0.0039 in.) or
more
i
depth. ,oplace
it
.
(6)
Wear
of camshaft and its tappet
roDer
beru:iJl:s
Replace
the
c.
amshaft
if
any
of
its
cam
surfaces.
is
badly worn , grooved
or
otherwise damaged or jf
its keyway
or
threaded
end
portions are found
defectlve.
Mike
the major diameter (cam height)
of
each
cam
to
determine its
wea
r ll1
referC!nce
to
the sundard size and if the amount
of
wear
is
noted
to
exceed
the
service limil,
repl3ce
the
camshaft.
(7)
Unit:
mm
find
It
em Standard
Service
timit
Cam
height
32
+0.1
-0
-
0.2
(major
dia
.)
(126
+0.0039)
(-0.0079)
- 0
Inspect the tapered roller bearings for wear. A
loose,
rattling
or
otherwise defective beanng
must
be replace
d.
CornUtloDofpwnph~
[n.pect the housing for cracks and examine the
threaded parts
for
damage. If the housing
is
in
cracked
or
damaged
condition
or
if
any
of
its
tappet
bore
is
f
O\lnd
10
have
worn
down
exces·
sively
as
a result of the check on the radiaJ clear·
ance
of
the tappet (in
(4)
.bovel, replace l
he
hous
ing.
Unit
: mm (in.)
Item
Service
tim
it
Pump housing lappet
bar.
24-0.15
(0.945 - 0.0059)
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