Yamaha MM700A, Manual, Page: 175 / 282

OIL INJECTION SYSTEM
OIL PUMP
Removal
This procedure describes steps to remove the oil pump
and gear assembly (Figure
6).
1. If the engine is installed in frame, observe the fol-
lowing:
2. Detach the outlet lines from the pump.
Remove the two screws (Figure 7) retaining the pump
to the crankcase.
4. Pull the pump away from the crankcase.
NOTE
The oil pump is driven by the cross-shaft in
the crankcase also drives the water
pump impeller. The cross-shaft is accessible
after disassembling the crankcase.
Inspection
1. Do not disassemble the oil pump. Individual parts are
not available. If damaged, replace. the entire oil pump as-
sembly.
2.
Outlet hoses contain check valves that should permit
oil to flow out, but not drain back. Check the valves for
proper operation.
3.
Check the oil hose fittings for tightness.
4. Move the oil pump operating arm (A, Figure 8) and
check for tightness or other damage. Replace the oil pump
if necessary.
1. Install a new O-ring seal (B, Figure 8).
2. Align the slot in the oil pump with the tang on the drive
shaft, then install the pump and secure it with the retaining
screws (Figure 7).
3. Attach the hoses to the pump. Make sure to install hose
clamps on all hose ends.
Remove the carburetors as described in Chapter 4. Connect the oil pump cable at the oil pump.
Five. 5. Bleed the oil pump as described in this chapter.
Disconnect the oil pump cable from the oil pump 6. Install the carburetors as described in Chapter Five.
control lever. 7. Synchronize the carburetors as described in Chapter
Detach the main oil hose at the oil pump and plug Three.
the hose to prevent leakage. 8. Adjust the oil pump as described in Chapter Three.