9-48
PTT gear pump
0
1
2
3
4
5
6
7
8
9
10
A
Disassembling the gear pump
housing
1.
Remove the manual valve
a
, and then
remove the gear pump assembly
b
.
2.
Remove the filters
c
.
3.
Remove the valve lock screws
d
, and
then remove the spring
e
, valve support
pin
f
, ball
g
, spring
h
, valve pin
i
,
and valve seal
j
.
A
Down-relief valve
B
Up-relief valve
TIP:
Before removing the valve lock screws
d
,
measure and write down the screw depth
a
and screw height
b
.
4.
Remove the bracket
k
, and then remove
the filter
l
, spacers
m
, springs
n
, valve
pins
o
, and balls
p
and
q
.
5.
Remove the gear housing
c
, and then
remove the springs
r
, down-main valve
s
, and up-main valve
t
.
6.
Remove the drive gear
d
, driven gear
e
, balls
u
, and pins
v
.
Checking the gear pump
1.
Check the drive gear
a
and driven gear
b
. Replace the gear pump assembly if
damaged or worn.
2.
Check the up-relief valve
c
and down-
relief valve
d
. Clean if there is dirt or
residue.
3.
Check the main valves
e
. Clean if there
is dirt or residue.
c
c
a
b
a
b
A
B
d
d
d
d
h
i
j
e
f
g
p
o
n
m
p
o
n
m
k
l
q
s
v
r
t
r
e
d
c
u
Summary of Contents for F225F
Page 1: ...SERVICE MANUAL 6CE 28197 3N 11 F L 225F F L 250D F L 300B ...
Page 4: ......
Page 54: ...1 31 SPEC Specification MEMO ...
Page 89: ...2 34 Lower unit 0 1 2 3 4 5 6 7 8 9 10 A MEMO ...
Page 263: ...6 28 Canister 0 1 2 3 4 5 6 7 8 9 10 A j k f b ...
Page 477: ...8 98 Shimming counter rotation model 0 1 2 3 4 5 6 7 8 9 10 A MEMO ...
Page 537: ...9 58 PTT cylinder 0 1 2 3 4 5 6 7 8 9 10 A MEMO ...
Page 562: ...A 1 MEMO ...
Page 565: ......
Page 566: ...May 2010 1 ABE E_1 YAMAHA MOTOR CO LTD ...
Page 576: ...A 13 ...