Machinist Mixer Manual
Zebra Skimmers Corp.
Page 2
888-249-4855 • www.ZebraSkimmers.com • Zebra Skimmers Corporation
Troubleshooting
Low Concentrations or None at All
1. Check the discharge hose. If you are NOT using the hose we provided, make sure you are using NO
MORE than 40” of discharge hose, with a minumum UNINTERUPTED ID of 1/2” for 3 gpm models, and
3/4” for 10 gpm models. Make sure that the hose has no kinks or other obstructions. If delivering mix
through a garden hose, for instance, a proportioning pump is required.
2. Examine the check valve at the bottom of the standpipe. Debris can keep it open, allowing concentrate to
drain back into the drum. The check ball should be below the valve’s set screw.
3. Check the water pressure. Our equipment requires a minimum pressure of 25 psi. TEST: Using the mixer
with needle valve closed, fill a pail of known volume and time it. If you can fill a 1 gallon pail in 20 seconds
there is enough pressure for our 3 gpm unit. If you can fill a 1 gallon pail in 6 seconds there is enough
pressure for our 10 gpm unit.
4. The needle-valve (dial) is numbered as a guide only. It does not indicate proportions. Turning the dial
clockwise reduces coolant concentrate ratio.
5. Check the coolant concentrate level in the drum. You may be running out.
6. Check the viscosity of the coolant concentrate. Our equipment is designed for up to 500 SUS at 100° F.
(SUS=saybolt universal seconds). 500 SUS is about the same as SAE30 motor oil.
Water Draining into Concentrate Container
1. Shut water ball valve off (check valve on end of standpipe is not rated to hold fluid under pressure).
2. Check water ball valve for cracks or damage.
3. If using a selenoid valve, install it on inlet before water supply (check valve on end of standpipe is not
rated to hold fluid under pressure).
Concentrate Siphoning from Container
1. Remove discharge hose from output holding container or sump.
2. Verify concentrate container’s breather hole is open.
3. Verify that the check valve is free of debri.
Warranty
• Lifetime warranty on all parts.
• Any use of this product outside the suggested parameters will void all warranties.
Visit
www.CoolantMaintenance.com
for clean coolant tips
If you have any questions or require product support,
please contact 888-249-4855
Copyright 2008 © ZSC • Zebra Skimmers Corp. • PO Box 833 • Chagrin Falls, OH 44022 • 888-249-4855 • www.ZebraSkimmers.com
Printed in the USA • Revised February 2008 • Information is correct as of the date printed. We reserve the right to change any information without notice.
