Ramsey H930 User Manual
OPERATING, SERVICE
AND MAINTENANCE
MANUAL
MODEL H-930 SERIES
®
DOW-LOK
EQUIPPED
INDUSTRIAL LOW-MOUNT WINCHES
CAUTION: READ AND UNDERSTAND THIS MANUAL BEFORE INSTALLATION
AND OPERATION OF WINCH. SEE SAFEGUARDS AND WARNING!
TABLE OF CONTENTS
INTRODUCTION ................................................................................................................1
WARRANTY INFORMATION ..............................................................................................1
SPECIFICATIONS..............................................................................................................1
TECHNIQUES OF OPERATION...........................................................................................2
WARNINGS.......................................................................................................................2
WINCH MAINTENANCE.....................................................................................................3
WINCH MOUNTING ..........................................................................................................3
CABLE INSTALLATION......................................................................................................3
HYDRAULIC SYSTEMS/PERFORMANCE CHARTS ............................................................4
HYDRAULIC SCHEMATIC..................................................................................................4
TROUBLESHOOTING.........................................................................................................5
INSTRUCTIONS FOR OVERHAUL OF 930/H-930 SERIES
DISASSEMBLY ........................................................................................................ 6-9
RE-ASSEMBLY ...................................................................................................... 9-12
AIR SHIFTER OVERHAUL ...............................................................................................13
DIMENSIONAL DRAWINGS.............................................................................................14
PARTS LIST AND PARTS DRAWING ......................................................................... 16-17
LIMITED WARRANTY.....................................................................................BACK COVER
RAMSEY WINCH MODEL H-930 DOW-LOK
PLEASE READ THIS MANUAL CAREFULLY
This manual contains useful ideas in obtaining the most efficient operation from your Ramsey
Winch, and safety procedures one needs to know before operating a Ramsey Winch.
WARRANTY INFORMATION
Ramsey Winches are designed and built to exacting specifications. Great care and skill go into every
winch we make. If the need should arise, warranty procedure is outlined on the back of your selfaddressed postage paid warranty card. Please read and fill out the enclosed warranty card and send
it to Ramsey Winch Company. If you have any problems with your winch, please follow instructions
for prompt service on all warranty claims. Refer to back page for limited warranty.
SPECIFICATIONS: CONFORMS TO SAE J706
Rated Line Pull 1st Layer
Gear Reduction: .................................................................................. 41:1
Shipping Weight H-930 .............................................. 515 lbs. (238 kgs)
Layer of Cable 1 2 3 4
Rated Line Pull lbs 30,000 24,500 20,700 18,000
All Models kgs 13,590 11,090 9,370 8,150
*Cable capacity ft 25 65 105 155
All Models m 7 19 31 47
Line Speed
*These specifications are based on recommended cable of 3/4"
(19mm) 6x19 extra improved plow steel cable.
(lbs) .................................................... 30,000
(kgs) ................................................... 13,590
FPM 13 17.6 20 24
MPM 3.9 5.3 6 7.2
NOTE: The rated line pulls shown are for the winch only. Consult the wire rope manufacturer for wire rope ratings.
1
TECHNIQUES OF OPERATION
The best way to get acquainted with how your winch operates is to make test runs before you actually use it. Plan
your test in advance. Remember, you hear your winch, as well as see it operate. Get to recognize the sounds of a
light steady pull, a heavy pull, and sounds caused by load jerking or shifting. Gain confidence in operating your
winch and its use will become second nature with you.
The uneven spooling of cable, while pulling a load, is not a problem, unless there is a cable pileup on one end of the
drum. If this happens reverse the winch to relieve the load and move your anchor point further to the center of the
vehicle. After the job is done, you can unspool and rewind for a neat lay of the cable.
The Dow-lok® clutch provides freespooling and clutch engagement with the cable drum. With the clutch disengaged, the cable can be freespooled off the drum. For winching in the load, the clutch must be fully engaged with the
drum.
Notches on the shifter shaft engage the bracket to positively latch the Dow-lok® clutch in the engaged, “IN” position
or disengaged, “OUT” position.
TO DISENGAGE CLUTCH raise handle so notch clears bracket. Pull handle out and latch the shaft notch onto bracket.
DO NOT ATTEMPT TO DISENGAGE WITH A LOAD ON THE WINCH.
TO ENGAGE CLUTCH raise handle so notch clears bracket. and push handle in as far as it will go. The clutch will
automatically spring into engagement and latch when the clutch aligns with the drum shaft. In order to attain full engagement, internal elements of the clutch MUST be aligned. This alignment will take place when cable drum or cable
drum shaft turns a maximum of 1/4 revolution.
DO NOT ATTEMPT TO LIFT A LOAD UNLESS NOTCH IN SHIFTER SHAFT IS SECURELY LATCHED. KEEP CLEAR OF
SPRING LOADED HANDLE DURING AUTOMATIC ENGAGEMENT.
The air-shifter clutch allows rapid unspooling of the cable, from cable drum, for hooking onto load. The air shifter
requires a separate, regulated air supply of 60-90 PSI. The clutch is operated by an air-cylinder as follows:
TO DISENGAGE CLUTCH run the winch in the reverse “OUT” direction until the load is off the cable. Apply 70-90 PSI
to inlet port fitting of air cylinder.
TO ENGAGE CLUTCH remove air pressure from air cylinder. Run the winch in reverse “OUT” direction until the cable
drum starts turning. After the clutch is fully engaged, the winch is ready for winching in the cable.
WARNINGS
• CLUTCH MUST BE TOTALLY ENGAGED BEFORE STARTING THE WINCHING OPERATION.
• DO NOT DISENGAGE THE CLUTCH UNDER LOAD.
• DO NOT LEAVE CLUTCH ENGAGED WHEN WINCH IS NOT IN USE.
• STAY OUT FROM UNDER AND AWAY FROM RAISED LOADS.
• STAND CLEAR OF CABLE WHILE PULLING. DO NOT TRY TO GUIDE CABLE.
• DO NOT EXCEED MAXIMUM LINE PULL RATINGS SHOWN IN TABLE.
• DO NOT USE WINCH TO LIFT, SUPPORT, OR OTHERWISE TRANSPORT PEOPLE.
• A MINIMUM OF 5 WRAPS OF CABLE AROUND THE DRUM BARREL IS NECESSARY TO HOLD THE LOAD. CA-
BLE ANCHOR IS NOT DESIGNED TO HOLD LOAD.
2
WINCH MAINTENANCE
Adhering to the following maintenance schedule will keep your winch in top condition and performing as it should
with a minimum of repair.
A. WEEKLY
1. Check the oil level and maintain it to the oil level plug. If oil is leaking out, determine location and repair.
2. Check the pressure relief plug in top of the gear housing. Be sure that it is in good operating condition so
that hot oil gasses may escape.
3. Lubricate cable with light oil.
B. MONTHLY
1. Lubricate the various grease fittings located in the cable drum, end bearing, clutch housing or clutch operating linkage. Any good grade of moly-disulfide containing grease is acceptable.
2. On the Dow-Lok clutch, check the action of the locking ring. Make sure it is spring loaded and free to
move fully against the cable drum in the engaged position and that it is pulled full away from the cable
drum and latched when disengaged.
3. Check the winch mounting bolts. If any are missing, replace them and securely tighten any that are loose.
Make sure to use only grade 5 bolts or better.
4. Inspect the cable. If the cable has become frayed with broken strands, replace immediately.
C. ANNUALLY
1. Drain the oil from the winch annually or more often if winch is used frequently.
2. Fill the winch to the oil level plug with clean kerosene. Run the winch a few minutes with no load in the
reel in direction. Drain the kerosene from the winch.
3. Refill the winch to the oil level plug with all purpose E.P. 140 gear oil.
4. Inspect frame and surrounding structure for cracks or deformation.
5. Gear wear can be estimated by rocking the drum back and forth and if necessary drain oil and remove
cover for closer inspection.
WINCH MOUNTING
It is most important that this winch be mounted securely so that the three major sections (the clutch housing end, the
cable drum, and the gear housing end) are properly aligned.
All standard model 930/H-930 series winches are furnished with recommended mounting angles. Angle size is
1/2x4x4 high strength steel angle.
CABLE INSTALLATION
1. Unwind cable by rolling it out along the ground to prevent kinking. Securely wrap end of wire rope, opposite hook,
with plastic or similar tape to prevent fraying.
2. Insert end of cable, opposite hook end, into the hole in drum barrel. Secure cable to drum barrel, using setscrew
furnished with winch, TIGHTEN SETSCREW SECURELY.
3. Carefully run the winch in the “reel-in” direction. Keeping tension on end of cable, spool all the cable onto the cable drum, taking care to form neatly wrapped layers.
3
HYDRAULIC SYSTEMS
Refer to the performance charts, below, to properly match your hydraulic system to the H930 Series Winch performance. The charts consist of: (1) Line speed, first layer (F.P.M.) vs. gallons per minute (G.P.M.) and (2) Line pull
(lbs.) first layer vs. working pressure (P.S.I). STATIC (solid line) refers to hoisting a suspended load from rest; DYNAMIC (dotted line) refers to maintaining the motion of a moving load.
Performance based on a motor displacement of 24 cubic inches with 35 GPM maximum flow rate. See page 14 for
motor port size.
H930 Performance
30,000 Lb. Duty Rating
41:1 Gear Ratio
30,000
25,000
20,000
15,000
10,000
5,000
LINE PULL, LBS., FIRST LAYER
C
I
C
I
M
T
A
A
T
YN
S
D
0
0
WORKING PRESSURE, P.S.I.
2,0001,000 0
TYPICAL LAYOUT
DUAL-A & B PORT CONTROL
3,000
15
10
5
LINE SPEED, FPM, FIRST LAYER
0
10
GALLONS PER MINUTE
20
30 35
MOTOR
HIGH PRESSURE LINE
A
B
CONTROL VALVE
3 POSITION, 4 WAY VALVE
(MOTOR OR CYLINDER SPOOL)
4
LOW PRESSURE LINE
PUMP
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