um Unverferth 2750, Operator'S Manual And Parts Catalog, Page: 41 / 112

2-13
Service
TROUBLE SHOOTING CONTINUED
PROBABLE CAUSE CORRECTION
BELT EDGES SHOWING EXCESSIVE WEAR
Belt tracking incorrect Adjust tracking as detailed in “Service” section
Poly seals on intake and/or discharge end
worn. Replace poly seals
PIVOTING ARM WILL NOT RAISE OR LOWER
Engine running too slow Increase engine speed
Not enough hydraulic fl ow going to valve. Adjust fl ow control valve to increase fl ow of oil.
CONVEYOR WILL NOT PIVOT
Pivot lock in place Unlatch conveyor or check pivot lock operating
mechanism.
Dirt or debris on pivot track Clean dirt from track
Bearing worn out Replace bearing
POWER PAK
Pump Squeals:
A. Oil level too low in reservoir A. Check sight gauge and fi ll to proper level
B. Oil is cold B. Run engine at low idle until hydraulic
fl uid warms
C. Intake strainer is plugged C. Drain reservoir and clean strainer
D. Return-line fi lter is plugged D. Remove and replace fi lter
E. Hoses are kinked or leaking E. Inspect, adjust or replace hose if necessary
Unit is lacking power:
A. Oil level too low in reservoir A. Check sight gauge and fi ll to proper level
B. Oil is cold B. Run engine at low idle until hydraulic
fl uid warms
C. Intake strainer is plugged C. Drain reservoir and clean strainer
D. Return-line fi lter is plugged D. Remove and replace fi lter
E. Hoses are kinked or leaking E. Inspect, adjust or replace hoses if
necessary
F. Pressure relief valve is set too low
or is plugged F. Remove cover and adjust with allen wrench.
or remove valve and inspect for contamina-
tion. See “Adjusting Hydraulic Pressure Re-
lief Valve” in Operations Section of this
manual.