Norac UC5 - Page 47


45

LeakingoilbetweentheNORACvalveblockandexpansionblock
1. Ensurethematingsurfacesarecleanandundamaged.
2. Sealsmustbecoatedwithoilpriortoinstallation.
3. Donotinstallthetemperatureprobeorflatwashersonthemountingbolts.
4. Ensurethemountingboltsaretorqued
correctly.
Theboomslowlycreepsdown
1. Ensurethe raiselines are connected to the “B” ports and the lower lines are connected to the “A”
ports.The“B”portisalwaystheloadholdingport.
2. ThePOcheckvalvemaybeleaking.Checkfordebrisoradamagedseal.
3. Try swapping the left and right hoses.If the problem follows the hoses it may indicate a problem
withthecylinderorsprayer’svalves.
Theboomfunctionwon’tmove
1. Thepressureandtankhosesmaybeinstalledbackwards.
2. The“A”and“B”linesmaynotbeinstalledonthesamestation.
3. The valve may be stuck.Manually operate the valve in both directions using the manual override
test.Performtheboom
functiontestagain.
4. Thecoilmayhavefailed.Tryswappingthecoilwithonefrom anotherknownworkingvalve.