Product: Air Winches
Models: IR Classic Winches
Subject: Differentiation of Rotation
By: Tom Gagnet, Manager of Product
Engineering
No. UL-014
Date: 7/20/93
Ingersoll-Rand Classic Winch applications
requiring Opposite Hand Configurations
Some confusion and opportunity exist in the
field in applying our IR Classic Winch products. Standard
vs. Underwound configurations may not be clear as to function
or what parts are different. Two more classifications, "OH"
Opposite Hand, or mirror image operation, to our standard
product, and "ROH" Underwound Opposite Hand, a
mirror image of Underwound units have been developed.
Opposite Hand operation is now possible by
the introduction of new rotary and reverse valves. These
valves are presently special and are price sensitive to
quantity. Check with marketing for price and delivery if
you have an application which warrants their use. "OH"
Opposite Hand and "ROH" Underwound Opposite Hand
configurations should be discouraged, however, due to cost
and lead time of the low volume valves to support them.
A word of caution: IR Classic Winches
are designed to produce a maximum performance and brake
timing in the designated direction of lift. If the rope
is wound onto a winch in the wrong direction, to accommodate
an application without the correct rotary and/or reverse
valve, serious consequences may result. Throttle operation
in the reverse direction of line movement, overspeeding
of the motor in the lowering direction, reduced brake capacity
and control problems may result, if handling suspended loads.
The following illustrations and chart will
help in explaining the difference in function and the valves
required to support each of four configurations.
Notes:
- The 744 reverse valves are used with either
manual or automatic brakes and replace the obsolete 944
manual brake reverse valves.
- Brake bands must be reversed on winches
for "OH" Opposite Hand and "R" Underwound
Operation (see illustration)
- Underwound and opposite hand valves are
not available for the BU7A, EU, and D6U family of winches,
due to the brake design.
- "Direction of cable winding tag"
located on gear end of all winches must be installed upside
down on "R" Underwound, or "OH" Opposite
Hand units. This will make the tag arrow correspond with
the correct direction of cable installation. Automatic
brake mounting bracket attaching the brake cylinder to
the base will have to be changed on HU and H5U winches
to move the brake action to the other side.
- The winch nameplate
must be stamped with an "R" (for Underwound),
"OH" (for Opposite Hand), or "ROH"
(for Underwound Opposite Hand), directly after the
model number.
Chart Showing valves required
and rotation direction for lifting
|
|
Valves
for Winch Configuration (Spares) |
>Looking
at Motor End |
| Winch
Series |
Standard
|
Underwound
|
Opposite
Hand |
Underwound
Opposite Hand |
Drum
|
Motor
Lift |
Throttle
|
| K6U
|
K6U-526
K6U-K744A |
|
|
|
CCW
|
CCW
|
CCW
|
|
|
K6U-526R
K6U-K744A
|
|
|
CW
|
CW
|
CCW
|
|
|
|
K6U-526ROH
K6U-K744AOH
|
|
CW
|
CW
|
CW
|
|
|
|
|
K6U-526ROH
K6U-K744AOH
|
CCW
|
CCW
|
CW
|
| |
Valves
for Winch Configuration (Spares) |
Looking
at Motor End |
| Winch
Series |
Standard
|
Underwound
|
Opposite
Hand |
Underwound
Opposite Hand |
Drum
|
Motor
Lift |
Throttle
|
| K4U
& K5U |
KU-526A
KU-K744A
|
|
|
|
CCW
|
CW
|
CCW
|
|
|
KU-526RA
KU-K744A
|
|
|
CW
|
CCW
|
CCW
|
| |
|
K6U-526AOH
KU-K744AOH
|
|
CW
|
CCW
|
CW
|
| |
|
|
KU-526RAOH
KU-K744AOH
|
CCW
|
CW
|
CW
|
|
|
Valves
for Winch Configuration (Spares) |
Looking
at Motor End |
| Winch
Series |
Standard
|
Underwound
|
Opposite
Hand |
Underwound
Opposite Hand |
Drum
|
Motor
Lift |
Throttle
|
| H5U
|
H5U-526
H5U-K744A |
|
|
|
CCW
|
CW
|
CCW
|
| |
H5U-526R
H5U-K744A |
|
|
CCW
|
CCW
|
CCW
|
| |
|
H5U-526OH
H5U-K744AOH |
|
CW
|
CCW
|
CW
|
| |
|
|
H5U-526ROH
H5U-K744AOH |
CCW
|
CW
|
CW
|
|
|
Valves
for Winch Configuration (Spares) |
Looking
at Motor End |
| Winch
Series |
Standard
|
Underwound
|
Opposite
Hand |
Underwound
Opposite Hand |
Drum
|
Motor
Lift |
Throttle
|
| Auto
Brake Bracket (H5U) |
HU-721
|
<HU-721
|
HU-729
|
HU-729
|
(See
Note 5)
|
|
|
Valves
for Winch Configuration (Spares) |
Looking
at Motor End |
| Winch
Series |
Standard
|
Underwound
|
Opposite
Hand |
Underwound
Opposite Hand |
Drum
|
Motor
Lift |
Throttle
|
| HU
|
HU-526RA
HU-K744A |
|
|
|
CCW
|
CW
|
CCW
|
| |
HU-526RA
HU-K744A |
|
|
CW
|
CCW
|
CCW
|
| |
|
HU-526AOH
HU-K744OH |
|
CW
|
CCW
|
CW
|
| |
|
|
HU-526RAOH
HU-744OH |
CCW
|
CW
|
CW
|
|
|
Valves
for Winch Configuration (Spares) |
Looking
at Motor End |
| Winch
Series |
Standard
|
Underwound
|
Opposite
Hand |
Underwound
Opposite Hand |
Drum
|
Motor
Lift |
Throttle
|
| Auto
Brake Bracket (HU) |
HU-721
|
HU-721
|
HU-729
|
HU-729
|
(See
Note 5)
|
|
|
Valves
for Winch Configuration (Spares) |
Looking
at Motor End |
| Winch
Series |
Standard
|
Underwound
|
Opposite
Hand |
Underwound
Opposite Hand |
Drum
|
Motor
Lift |
Throttle
|
| HU40
|
HU-526RA
HU-K744A |
|
|
|
CCW
|
CCW
|
CCW
|
|
|
HU-526A
HU-K744A |
|
|
CW
|
CW
|
CCW
|
|
|
|
HU-526
RAOH
HU-
K744OH |
|
CW
|
CW
|
CW
|
|
|
|
|
HU-526AOH
HU-K744OH |
CCW
|
CCW
|
CW
|
Auto
Brake is not avai lable on HU40's
|
1.
Brake anchor side for HU, U5U, K4U and K5U Series.
2. Normal position
brake for operator or lever arm.
3. Throttle direction
for lift or pull.
4. Short brake band
side and anchor pin location for K6 and HU40 Series.
|
|
|
|
STANDARD
|
|
|
|
|
|
OPPOSITE
HAND (OH) |
| |
 |
| UNDERWOUND
(R) |
| |
 |
| UNDERWOUND
OPPOSITE HAND (ROH)
|
