Echo 72928 Owners Manual v.7 - Manual (Page 26)

9 INCH CHIPPER 22
TROUBLESHOOTING
PROBlEM PROBABlE CAUSE SUggESTED SOlUTIONS
Will not attain normal feed
rate
Engine not operating at correct speed. Repair engine governor.
Control linkage damaged or binding. Repair control linkage.
Bypass valve stuck partially open (Prob-
lem in one direction only).
Repair bypass valve.
Remove foreign material from valve.
Will not feed when control
arm is moved.
Control linkage damaged or not connect-
ed.
Repair or reconnect control linkage.
Drive between engine and pump dam-
aged.
Repair drive (replace broken belt, repair
sheared key, repair spined coupling, etc.)
Pump low on fluid. Refill reservoir. Purge air from system.
Feed rate is sluggish under
load.
loose drive belt between engine and
pump.
Tension drive belt (replace if necessary).
Pump low on fluid.
Refill reservoir. Purge air from system if
necessary.
Large amount of water in hydraulic fluid
(evaporates when hot, resulting in low
fluid level).
Drain fluid from reservoir and unit, replace
filter element, and refill with new fluid.
Hydraulic feed will not pull in
logs over 9" in diameter.
Hydraulic system overloading.
Check relief pressure in system with a
pressure gauge rated to 2500 psi (system
set by factory at 1750 psi).
5.2 HYDroSTaTiC PumP TroubleSHooTing