Assembling The Gear Pump - Yamaha F150A Service Manual

Assembling the gear pump

Lubricate the parts using ATF Dexron II dur-
ing assembly.
When assembling the PTT unit, do not use
a rag. Otherwise, dust and particles could
get on the PTT unit components, causing
poor performance.
1. Install a new O-ring "1" and the valve
seat "2".
2
1
2. Install the drive gear "1", driven gear "2",
balls "3", and pins "4", and then install the
gear housing "5".
5
2
1
3. Install new O-rings "1" and "2" and the
bracket "3", and then tighten the pump
bracket bolts "4" and "5" to the specified
torque.
3
4
4
2
Pump bracket bolt (M5) "4":
7 N·m (0.7 kgf·m, 5.2 ft·lb)
Pump bracket bolt (M4) "5":
4 N·m (0.4 kgf·m,, 3.0 ft·lb)
4. Install a new valve seal "1", the valve pin
"2", and the spring "3", and then install
the valve lock screw "4".
5. Install a new O-ring "5" to the valve sup-
port pin "6".
6. Install the ball "7", valve support pin "6",
and spring "8", and then install the valve
lock screw "9".
TIP:
• Install the valve lock screw "4" and valve
lock screw "9" to the height "a" and depth
"b" that were measured before removing
them.
• If installing new parts, install them accord-
ing to the preceding reference data.
9-59
PTT gear pump
4 5
1
3