TM 92590-209-14&P
Table 4-2. Troubleshooting - Continued
MALFUNCTION
TEST OR OPERATION
CORRECTIVE ACTION
5.
BLADE ASSEMBLY FAILS TO OPERATE - CONTINUED.
Step 3.
Place HYDRAULIC PUMP switch in ON position. Check if blade assembly will float when control valve
is placed in the float position.
a.
If blade assembly floats, proceed to step 4.
b.
If blade assembly does not float, proceed to step 13.
Step 4.
Place control valve in hold position. Check if blade assembly will hold.
a.
If blade assembly will hold, proceed to step 5.
b.
If blade assembly will not hold, proceed to step 13.
Step 5.
Check if blade assembly will move at a rate of at least 5-1/2 inches per second in either direction when
engine is at 1500 rpm.
a.
If blade assembly moves at 5-1/2 inches per second or more, proceed to step 6.
b.
If blade assembly moves at less than 5-1/2 inches per second, proceed to step 13.
Step 6.
Check If blade assembly will raise but not lower.
a.
If blade assembly will raise but not lower, replace manifold control valve (para 4-53).
b.
If blade assembly will not raise, replace unloader valve (para 4-48).
Step 7. Check all linkages from blade control lever assembly to control valve for proper adjustment (para 4-87).
Check control handle shaft and lever arms for free play between shaft and arms.
a.
If properly adjusted and no free play, proceed to step 8.
b.
If not properly adjusted or free play between shaft and arms, repair or adjust (para 4-87).
Step 8.
Check blade assembly for obstacles that are preventing blade assembly response.
a.
If obstacles are present, shut off engine and remove obstacles.
b.
If no obstacles, proceed to step 9.
4-70