DARLEY ZSP, Nstallation, Operation, Maintenance, Repair And Troubleshooting Instructions

Page: 122 / 155

Prepared by: RJG Rev. #: A
Revised by: JAF Date: 03/23/12
Approved by: WAH 1200644
Revision Date:14AUG13
Troubleshooting:
- If the electric clutch is not functioning / slipping beyond normal operating characteristic:
o
Check system supplied voltage. Under a static energized condition the clutch should
be pulling 12 VDC @ 4.89 Amps with 2.45 Ohms (+/- 5%) of resistance across the
coil and 24 VDC @ 1.26 Amps with 9.51 Ohms (+/- 5%) of resistance across the
coil; depending on the clutch (12 or 24 VDC) being used. Note that these figures
are at an ambient temperature of 68
o
F.
o
These figures can be checked with the correct measuring/inspection equipment.
Such as a properly calibrated Multi Meter with a Current Clamp.
o
Any deviation from these figures when experiencing clutch challenges could indicate
a problem with the clutch coil or an insufficient supply voltage and current. Contact
W.S. Darley Customer Service if these problems occur.
- Vibration in belt/clutch assembly:
o
Could be indicated by:

Damaged Belt

Contaminated Bearing

Loose clutch body mounting bolt (through clutch bore into primer rotor/shaft
assembly)

Loose bolts holding belt tension

Revisit the primer assembly drawing and contact W.S. Darley Customer
Service if necessary. Proper belt tension is a must.

Belt tension can be inspected and validated by:
o
Placing a 6 lb
– 7 lb force on the belt along its periphery directly
between the center axis of each pulley. The belt should
deflect approximately 5/32
” +/-.015”; beyond these figures in
either dir/- will yield a belt tension that is to loose or to
tight and will detrimentally affect belt, sheave and clutch life.

Damaged rotor/shaft assembly

Damaged or broken primer vane

Particulate trapped in primer/rotor body vane area

Excessive slipping in between clutch armature assembly and friction material

If this occurs, excessive heat may generate, causing warpage and
damage to the armature and friction material

Heat signs will show, bluing and blackening of surrounding areas from
heat source