Honda BF135A - Check Point

2-43
BF135A•BF150A
• POWER TRIM/TILT ASSEMBLY QUICK REFERENCE CHART
Symptom Pressure check
Does Does
not not tilt Does not hold Check point Check/repair method
tilt up down
Lowers Extends
— —
Motor assembly
Manual valve
— — Backup ring
O-ring
(Piston rod B)
Backup ring
O-ring
(Free piston)
— — — Check valve
(Free piston)
—
— — O-ring
(Piston rod comp.)
—
— — Shock relief valve
(Piston rod comp.)
— — — Dust seal, O-ring
(Cylinder cap)
— — — — Oil (ATF)
— — Pump assembly
Up relief valve
— — — — Down relief valve
— — Lower chamber
check valve
— — Lower chamber
spool valve
Upper chamber
check valve
— — Upper chamber
spool valve
Check the motor assembly.
Check that the manual valve is installed
securely. Replace if it is damaged.
Check the O-ring surface for damage
and replace if necessary.
If there is no damage, clean the O-ring
and install on the manual valve properly.
Check the backup ring for damage and
replace if necessary.
Check the O-ring surface for damage
and replace if necessary.
If the backup ring and O-ring are nor-
mal, clean and install on the piston rod
B properly.
Check the backup ring for damage and
replace if necessary.
Check the O-ring surface for damage
and replace if necessary.
If the backup ring and O-ring are nor-
mal, clean and install on the free piston
properly.
Check the ball seat and the neighboring
area for damage and replace the free
piston as an assembly if necessary. (Do
not disassemble the free piston.)
Check the O-ring surface for damage
and replace if necessary.
Check the ball seat and the neighboring
area for damage and replace the piston
rod comp. as an assembly if necessary.
(Do not disassemble the piston rod
comp.)
Check the dust seal and O-ring for dam-
age and foreign material (oil leakage).
Replace if necessary.
Check the oil level and add the oil if
necessary.
If the pump turns idle or excessively
heavy, replace the pump assembly. (Do
not disassemble the pump assembly.)
The valves are built in the pump assem-
bly. Replace the pump assembly if nec-
essary. (Do not disassemble the pump
assembly.)
Lower chamber
hydraulic pres-
sure lower than
spec. or pres-
sure drops.
Upper chamber
hydraulic pres-
sure lower than
spec. or pres-
sure drops.
(See page 2-44)