Yamaha F90D - Disassembling the Gear Pump; Checking the Gear Pump; Assembling the Gear Pump

BRKT
Bracket unit
7-33
6D81G11
Disassembling the gear pump
1. Remove the manual valve, then the gear
pump and filters.
2. Remove the relief valve seat caps, then
the up-relief valve seat
1
and down-
relief valve seat
2
.
3. Remove the lever
3
, then the shuttle
pistons
4
.
4. Remove the gear pump bracket
5
, then
the adapters
6
.
5. Remove the pins
7
, then the drive gear
8
and driven gear
9
.
Checking the gear pump
1. Clean all the pistons and balls, and then
check them for damage or wear. Replace
if necessary.
2. Check the filters for damage or clogs.
Replace if necessary.
3. Check the drive gear and driven gear for
damage or wear. Replace the gear pump
assembly if necessary.
Assembling the gear pump
1. Install the drive gear
1
and driven gear
2
into the gear pump housing.
2. Install the balls
3
into the gear pump
housing.
3. Install the gear pump cover
4
, then the
pins
5
.
S6D87370
4
3
2
1
4
S6D87560
S6C17600
6
6
5
7
7
8
9
S6C17610
1
2
3
3
1
2
3
3