Two Speed Motor Case Drain Plumbing; Preventive Maintenance - BRADEN PD12C Series Installation Maintenance And Service Manual

TWO SPEED MOTOR CASE DRAIN PLUMBING

Some hoists with two speed gear motors may have
been installed with the motor case drain connected to
the drain port of the brake valve. This system may result
in accelerated motor shaft seal wear and leakage. The
following modifi cation should be made to the motor hy-
draulic piping to prevent this type of seal damage.
1. Remove the motor case drain hose from the
brake valve drain port and install plug, Item
1, into the valve port. Remove the hose from
the case drain port elbow, Item 4.
2. Install a new case drain hose, Item 2, onto
the motor case drain elbow, Item 4.
3. Install the tee adapter, Item 3, into the two-
speed motor shift valve drain port (identifi ed
by long end cap).
4. Install the new motor case drain hose, Item
2, onto the tee adapter.
5. Install a case drain hose for the tee directly
to the reservoir. Minimum hose size is –6,
3/8 in. (9.5 mm). Maximum drain line back
pressure is 100 PSI (690 kPa) measured at
the motor case drain port.

PREVENTIVE MAINTENANCE

A regular program of preventive maintenance for your planetary hoist is strongly recommended to minimize the
need for emergency servicing and promote safe, reliable hoist operation.
Field experience, supported by engineering tests, indicate the three (3) service procedures listed below are the
MOST critical to safe, reliable hoist operation and must be observed.
• Regular Gear Oil Changes – every 1000 hours or six (6) months
• Use of Proper Gear Oil – recommended type for prevailing ambient temperature
• Periodic disassembly and inspection of all wear items.
The following minimum service intervals are speci-
fi ed for operating hours of the prime mover.
1
2
3
ITEM DESCRIPTION
1 Plug, -4 ORB
Hose, 17-in. OAL
2
(-4 JIC Fml Svl/-4 Hose/ 1/8 NPT ml)
3 Tee -4 (ORB Branch -4 JIC Run)
1. OIL LEVEL
The gear oil level should be checked every 500
operating hours or three (3) months, whichever occurs
fi rst. To check the oil level, remove the large plug locat-
ed in the center of the drum support. The oil should be
level with the bottom of this opening or approximately
half-way up in a sight glass. This is extremely impor-
tant due to the accelerated wear that can be caused
by insuffi cient lubricating oil in the hoist. If addi-
tional oil in needed, refer to "Recommended Planetary
Gear Oil".
10
QTY PART #
1 25663
1 13707
1 29078