Milnor 72044 WP2, Service, Page: 25 / 202

MSSM0201CE/9840AV (1 of 11)
È LUBRICATION AND PREVENTIVE MAINTENANCE
FOR HYDRO-CUSHION
®
MACHINES
Ê General Requirements
Maintenance procedures require:
•
A hand operated grease gun.
•
The correct lubricants (see “LUBRICANTS FOR MILNOR MACHINES,” in the Table of Contents).
Ê Lubricant Requirements
To achieve the optimum performance and service life from the Milnor
®
machine and as a warranty require-
ment, the machine must be lubricated in strict accordance with the instructions in this section.
ENTANGLE AND CRUSH HAZARD—Belts and pulleys can entangle and crush
body parts.
☞
Lock OFF and tag out power at the wall disconnect before servicing, except
where specifically instructed otherwise in this section.
☞
Insure belt and pulley guards are in place during service procedures.
☞
Permit only qualified maintenance personnel to perform these procedures.
CRUSH/SEVER HAZARD—Tilting mechanism can crush or sever parts of your
body caught in them.
☞
Install the safety stands before performing maintenance under a tilted ma-
chine.
☞
NEVER test or operate (manually or automatically) any machine function
with any portion of a person’s body under the tilted machine—even if the
safety stands are installed.
CRUSH/SEVER HAZARD—Tilting machines with tilt wheels/cradles may lunge
forward or rearward and even fall over if the tilt wheels at the non-tilted end are
raised out of their cradles—killing/injuring personnel and/or damaging prop-
erty.
☞
NEVER manually tilt (lift) both ends of the machine at the same time. One end must
always be seated in its cradle.
☞
ALWAYS visually inspect the tilt wheels to be sure they are all fully seated in their cra-
dles before each manual tilt up.
☞
Hydraulic valve manual operation must be done by trained competent maintenance per-
sonnel who thoroughly understand the system and all the consequences of manual
operations.
☞
ALWAYS understand beforehand all the consequences of manually operating hydraulic
valves.
☞
Never permit operation with malfunctioning tilt limit switches.
Ê Correct Grease Gun Procedures
1. Do not use a pneumatic grease gun. Pump grease slowly, taking 10-15 seconds to complete each stroke.
A grease gun can build up extremely high pressure which will force seals out of position and cause them to
leak, even though both the seal and the bearing housing are equipped with spring loaded relief plugs.
2. Apply quantity of grease called for in the checklist. Over-lubrication can be as damaging as under-lubrica-
tion. Where quantities are stated in strokes, one stroke of the grease gun is assumed to provide .0624 fluid
ounces (1.77 grams) (by volume) of grease. Therefore, one fluid ounce (28.3 grams) of grease would be pro-
vided by 16 strokes of the grease gun. Determine the flow rate of your grease gun by pumping one ounce
into a calibrated container. If fewer than 16 strokes are required, all quantities in strokes in the chart should
be reduced accordingly, and if more than 16 strokes are required, the number of strokes should be increased.
Before starting lubrication, make sure your grease gun is working and that you get a full charge of
grease with every stroke.
3. Do not pump grease in until it oozes out of the spring loaded relief plugs. Plugs bleed out excess grease
and help prevent abnormal pressures from building up in the housing during operation (especially when the
machine is first commissioned and after each lubrication). Plugs will not protect against over-lubrication.
4. Do not over-lubricate motors. Over-lubrication of a motor can seriously damage it by forcing grease into
motor windings. Over-lubrication of the extract motor can force grease into the centrifugal switch causing it
to malfunction.
5. Do not allow grease to drip on the brake disk or clutch tire/drum during lubrication. This will reduce
the braking action considerably, and may permit the cylinder to creep while loading and unloading.