ENGINE
REMOVAL OF ENGINE (figure 7l-1)
1. Turn off all electrical switches in cockpit and disconnect the battery ground wire at battery
2. Move fuel selector lever in cockpit to OFF.
3. Remove engine cowling. (Refer to Removal of Cowling.)
4. Remove propeller. (Refer to chapter 6l.)
5. Disconnect cabin heat tube from heat muff.
6. Disconnect primer line at tee connection.
7. Disconnect mechanical fuel pump inlet line that is connected to the right side of the pump
8. Disconnect starter leads at starter and their attachment clamps.
9. Disconnect alternator leads and attachment clamps.
10. Disconnect carburetor heat, throttle and mixture controls from engine components.
11. Disconnect tachometer cable from rear of engine.
12. Disconnect hose from vacuum pump.
l3. Disconnect magneto P leads and insert a protective cover over connection.
l4. Disconnect oil pressure line from rear of engine.
l5. Disconnect propeller control cable at propeller governor and manifold pressure line from left rear
cylinder of engine.
16. Attach a one-half ton (minimum) hoist to hoisting strap and relieve tension on engine mount.
—CAUTION—
Place a tail stand under tail of airplane before removing engine.
l7. Check engine for any attachments remaining to obstruct its removal.
l8. Drain engine oil, if desired, and close drain.
—CAUTION—
Be careful when dismounting engine so as not to damage any
attaching parts.
l9. Remove four engine mount assemblies and swing engine free.
PRE-OILING ENGINE
To avoid high speed bearing failure resulting from lack of lubrication during initial starts, pre-oil engine
prior to first start after engine change, overhaul or any prolonged period of inactivity. Engines need not b oiled
after an oil change or after oil lines have been disconnected.
l. Fill oil sump to proper level.
2. Remove one spark plug from each cylinder of engine.
3. Place mixture control in idle cut-off.
4. Turn engine with starter (or external power source, if available) until a minimum pressure 20 pounds is
indicated on oil pressure gauge.
—NOTE—
If oil pressure is not attained after cranking for one minute,
allow starter to cool.
71 - 03 - 00
Page - 71-08
Reissued: August 1, 1986
2H23
PIPER AIRCRAFT
PA-28-236
MAINTENANCE MANUAL
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