DURACLASS 1715PL User manual

MODEL 1715PL & 1721PL
ARM TYPE
PLATFORM CONVERSION HOISTS
INSTALLATION,OPERATION,MAINTENANCE,& PARTS LISTS MANUAL
IF INCORRECTLY USED, THIS EQUIPMENT CAN CAUSE SEVERE
INJURY. THOSE WHO USE AND MAINTAIN THE EQUIPMENT SHOULD
BE TRAINED IN ITS PROPER USE, WARNED OF ITS DANGERS, AND
SHOULD READ ENTIRE MANUAL BEFORE ATTEMPTING TO SET
UP, OPERATE, ADJUST OR SERVICE THE EQUIPMENT. KEEP THIS
MANUAL FOR FUTURE REFERENCE.
DURACLASS
TED 72050-1182
GENERAL OFFICES: TISHOMINGO, MS
PHONE: CABLE ADDRESS:

IMPORTANT SAFETY NOTICE
Proper service and repair are important to the safe, reliable operation of DuraClass
products. Service procedures recommended by DuraClass are described in this service
manual and are effective for performing service operations. Some of these service op-
erations may require the useof tools or blocking devices specially designed for the pur-
pose. Special tools should be used when and as recommended. It is important to note
that some warnings against the use of specic methods that can damage the product or
render it unsafe are stated in the service manual. It is also important to understand these
warnings are not exhaustive. DuraClas could not possibly know, evaluate and advise the
service trade of all conceivable ways in which service might be done or of the possible
hazardous consequences of each way. Consequently, DuraClass has not undertaken
any such broad evaluations. Accordingly, anyone who uses service procedures or tools
which are not recommended by DuraClass must rst satisfy himself thoroughly that nei-
ther his safety nor the product safety will be jeopardized by the method he selects.
WARRANTY
DuraClass warrants this unit to be free form defects in material and workmanship, under
normal use and service, for a period of ninety (90) days, said period to run from the date
when rst placed into operation.
This warranty is expressly limited to the replacement or repair at its factory in Tishomin-
go, MS. or such other place as DuraClass may designate, of such parts of such products
as shall be returned to it with transportation charges prepaid and which shall appear to
its satisfaction, upon inspection at such factory or other place designated by it, to have
been defective in material or workmanship.
This warranty does not apply to any unit of DuraClass equipment which shall have been
repaired or altered outside of DuraClass so as to affect its stability or which has been
subject to misuse, negligence or accident or which shall have been installed or operated
other than in accordance with the printed instructions of DuraClass.
This warranty does not obligate DuraClass to bear the cost of labor in replacing defec-
tive parts. No other obligation is assumed or authorized to be assumed with respect to
productsof DuraClass other than herein set forth.
DURACLASS DOES NOT ASSUME ANY LIABILITY FOR SECONDARY CHARGES,
EXPENSES FOR ERECTING OR DISCONNECTING, OR ANY OTHER CONSEQUEN-
TIAL LOSSES OR DAMAGES.
"WE MAKE NO OTHER WARRANTY, EXPRESS OR IMPLIED, AND MAKE NO
WARRANTY OF MERCHANTABILITY OR OF FITNESS FOR ANY PARTICULAR
PURPOSE."
DURACLASS
TISHOMINGO,MS.

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INDEX
Page
Important Safety Notice & Warranty........................................................................................................2
Decal Placement. .....................................................................................................................................4
SECTION 1 — GENERAL INFORMATION
1.1 Introduction ................................................................................................................................6
1.2 General Information....................................................................................................................6
1.3 Hoist Capacity .........................................................................................................................6
SECTION 2 — INSTALLATION INSTRUCTIONS
2.1 Hoist & Spacer Pads....................................................................................................................8
2.2 Power Take-Off, Pump & Drive Line ................................................................................8
2.3 Controls.......................................................................................................................................8
2.4 Piping & Filling System..............................................................................................................8
2.5 Remount Body & Body Guides...................................................................................................9
2.6 Venting of System........................................................................................................................9
2.7 Decals...........................................................................................................................................9
SECTION 3 — OPERATION
3.1 General .......................................................................................................................................12
3.2 DenitionofanOperator............................................................................................................12
3.3 Power Take-Off Operation .........................................................................................................12
3.4 Hoist Operating Instructions.......................................................................................................13
3.5 Vehicle Storage...........................................................................................................................13
SECTION 4 — MAINTENANCE
4.1 General .......................................................................................................................................14
4.2 Safety Precautions.......................................................................................................................14
4.3 Suggested Preventive Maintenance Program..............................................................................14
4.4 Lubrication..................................................................................................................................15
4.5 Hydraulic Oil...............................................................................................................................15
4.6 Corrective Maintenance (Trouble Shooting)...............................................................................15
SECTION 5 — REPAIRS
5.1 Cylinder.......................................................................................................................................18
5.2 Pump...........................................................................................................................................18
PARTS INFORMATION
Instructions for Ordering Parts...................................................................................................19
Hydraulic Pump (A219C1411 & A219C1412)..........................................................................20
Hoist Frame, 1715PL (A239C442)............................................................................................22
Hoist Frame, 1721PL (A239C479)............................................................................................23
Hydraulic Cylinder, 1715 & 1715PL (A1C3906)......................................................................24
Hydraulic Cylinder, 1721 & 1721PL (A1C3907)......................................................................25
Body Locking Device (A53C455).............................................................................................26
Lube Chart..................................................................................................................................27
Body Prop Installation................................................................................................................28
Valve Control Safety Lock..........................................................................................................29
Controls Installation (701E3029)................................................................................................31
Mounting Drawing, 1715 (701D3499)........................................................................................32
Mounting Drawing, 1721 (701D35010.......................................................................................33
Mounting Drawing, Body Holddown 1715 & 1721, (701D3512)..............................................34

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DECAL PLACEMENT

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DECAL PLACEMENT
ARM HOIST & BODY INSTALLATION
DECAL PLACEMENT & SERIAL
NUMBER PLATES LOCATION
BEFORE PLACING THE DUMP UNIT INTO OPERATION, THESE DECALS MUST BE PLACED IN
THEIR PROPER POSITION.
CAUTION DECAL #212A1103 IS 3-1/2” X 9”. IT MUST BE PLACED ON CHASSIS FRAME
AS SHOWN - ONE ON EACH SIDE.
WARNING DECAL #212A735 IS 1-7/8” X 4-1/2”. IT MUST BE PLACED ON THE DASH
ABOVE CAUTION DECAL #212A1104 THAT IS 1-7/8” X 4-1/2”.
INSTRUCTION DECAL #212A1166 MUST BE PLACED ON DASH NEXT TO THE CAUTION AND
WARNING DECALS AS SHOWN IN THE SKETCH.
CAUTION DECAL #212A1131 IS 4-3/4” X 5”. IT MUST BE PLACED ON THE DUMP BODY
ABOVE THE SERIAL NUMBER PLATE AS SHOWN IN THE SKETCH.
IF THE INSTALLATION HAS LEVER CONTROLS USE DECALS #212A1164. SELECT THE
DECAL THAT CORRESPONDS TO THE DIRECTION OF TRAVEL FOR PTO LEVER IN AND OUT
AND FOR HOIST CONTROL UP AND DOWN.
IF THE INSTALLATION HAS CABLE CONTROLS, YOU WILL USE #212A1167 DECAL FOR
HOIST CONTROL AND #212A1168 DECAL FOR PTO CONTROL. BASED ON THE CONTROLS
INSTALLATION FOR THIS SPECIFIC HOIST, YOU WILL HAVE TO SELECT AND INSTALL
THE PTO DECAL (212A1168-1 or 212A1168-2) THAT CORRESPONDS TO THE DIRECTION
OF TRAVEL OF THE CABLE CONTROLS FOR THE PTO IN AND OUT.
6
1
2
4
3
5

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SECTION 1 — GENERAL INFORMATION
1.1 INTRODUCTION
This instruction manual contains installation, operation, maintenance, and parts list informa-
tion for DuraClass Model 1715 PL and Model 1721 PL conversion hoists.
1.2 GENERAL INFORMATION
These are twin arm type hoists and are designed for use with wood or steel platform bodies.
The 1715PL hoist is used with bodies from 10' (3.048 m) to 15' (4.572 m) long, and the 1721
PL hoist is used with bodies 11' (3.353 m) to 17' (5.182 m) long. These are for single axle
chassis installations and the dumping angle is 45°.
1.3 HOIST CAPACITY
Lifting capacity depends on the body length and the overhang beyond the rear hinge. The
capacities for each model hoist and the recommended body lengths are charted in Figure 1.

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CHASSIS CAB TO
AXLE
BODY LENGTH CAPACITY - BODY & PAYLOAD
1715PL 1721PL
IN. MM FT. M TONS-U.S. TONS-
METRIC
TONS-U.S. TONS-
METRIC
60 1524 10.0 3.048 16.0 14.5
72 1829 11.0 3.353 13.0 11.8 16.0 14.5
12.0 3.658 16.0 14.5 19.0 17.2
84 2134 12.0 3.658 11.0 10.0 13.5 12.2
12.5 3.810 12.0 10.9 14.5 13.2
13.0 3.962 13.0 11.8 15.5 14.1
13.5 4.115 14.0 12.7 17.0 15.4
102 2591 13.0 3.962 8.5 7.7 10.5 9.5
13.5 4.115 9.0 8.2 11.0 10.0
14.0 4.267 9.5 8.6 11.5 10.4
14.5 4.420 10.5 9.5 12.5 11.3
15.0 4.572 11.0 10.0 13.5 12.2
120 3048 15.0 4.572 9.5 8.6
15.5 4.724 10.0 9.1
16.0 4.877 10.5 9.5
17.0 5.182 11.5 10.4
SECTION 1 - GENERAL INFORMATION
Above capacities are based on mounting body with 3" (76 mm) clearance be-
tween front of body and back of cab, and hinge location 32" (813 mm) behind
centerline of rear axle for 1715PL hoist and 33-1/8" (841 mm) for 1721PL hoist.
Also assumes level loading, with center of gravity at midpoint of body.
FIGURE 1 - HOIST LIFTING CAPACITY
FOR MODEL 1715PL AND
MODEL 1721PL
CONVERSION HOISTS
HOIST LIFTING CAPACITY

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SECTION 2 — INSTALLATION INSTRUCTIONS
Refer to mounting drawing 701D3499 for the 1715PL hoist and 701D3501 for the 1721PL hoist and
perform the following.
REVIEW MANUAL BEFORE STARTING INSTALLATION.
STUDY THE JOB CAREFULLY TO DETERMINE ALL OF THE
HAZARDS PRESENT AND SEE THAT ALL NECESSARY
SAFEGUARDS OR SAFETY DEVICES ARE PROVIDED TO
PROTECT ALL PERSONNEL AND EQUIPMENT INVOLVED.
1.1 HOIST AND SPACER PADS
Remove body from chassis. Cut off end of chassis rails as shown and locate hoist frame square
on chassis and with hinge apron tight against end of chassis. Cut off front en dof hoist frame, if
necesary, to hold 3” (76.20 mm) clearance between frame and back of cab.
Locate spacer pads as shown; drill holes in pads to clear rivets, and weld pads to hoist frame.
Locate hold downs and drill holes in chassis for snug t of bolts.
2.2 POWER TAKE-OFF, PUMP AND DRIVE LINE
Select the correct power take-off to match truck transmission. The PTO output shaft should run at
45 to 65 percent of engine speed. Mount PTO according to manufacturer’s recommendation.
Bolt pump to hoist frame as shown and install drive shaft from PTO to pump. The centerline to
centerline of front and rear 80” (2032 mm). Cut drive shafts to the proper length to have maximum
engagement in universal joints. Hand grease end of drive shaft and slip joint before installing. Max-
imum angle on drive line shafts not to exceed 10°. See Figure 2 for installation recommendations.
2.3 CONTROLS
Lever controls are standard and should be mounted on the oor of the cab convenient to operator.
See control installation drawing.
2.4 PIPING AND FILLING SYSTEM
Connect piping from pump to cylinder as shown. Use a thread sealing compound on all pipe
threads.
Remove piping from pump to cylinder as shown. Use a thread sealing compound on all pipe
threads.
Remove vent plug at top of cylinder and ll with oil (See Section 4.5 for proper oil). Replace plug.
CAUTION
!

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SECTION 2 — INSTALLATION INSTRUCTIONS
2.5 REMOUNT BODY AND BODY GUIDES
Install Z Iongmembers. Cut off front of longmemeber, if necessary, to hold 3” (76.20 mm)
clearance between longmember and back of cab. Mount Iongmembers to outside (as shown),
if possible. If longmember are mounted to inside, hinges must be shimmed so that side move-
ment of long members is restricted to 1/8” (3.04 mm). Install grease ttings in hinges.
Install crosshead shaft through pick up plates of longmembers and upper end of links. Bolt in
place.
Remount body so that it is square on the chassis, has the proper cab clearance and ts
snugly into Z longmembers. If wood longmembers on body, bolt to Z longmembers with 1/ 2”
(12.70 mm) carriage bolts (not furnished). If steel longmembers, bolt to Z longmembers with
1/2” (12.70 mm) capscrews (not furnished), or weld body longmember to Z longmembers.
Locate body guides at a convenient location close to cylinder trunnion. Drill (4) 41/64” (16.25
mm) holes in chassis rail, using holes in body guide as a template. Bolt in place.
2.6 VENTING OF SYSTEM
WHEN ANY WORK IS TO BE DONE ON BODY OR HOIST AND
BODY IS FULLY OR PARTLY RAISED, IT MUST BE BLOCKED
SECURELY SO IT CANNOT FALL. IN ADDITION, DISENGAGE
THE PTO AT SUCH TIME.
READ AND STUDY OPERATION SECTION OF ANUAL BEFORE
PROCEEDING.
Raise body slowly until cylinder is fully extended and block body securely. Remove vent plug from
top of cylinder and rell cylinder if necessary. Raise and lower the body several times until air is
eliminated from the system. Recheck oil, observing Warning precautions. With body raised the
oil level should be 2" (50.80 mm) to 3" (76.20 mm) below the ll hole in the cylinder. Add oil, if
necessary. Replace vent plug.
Keep dirt out of system.
2.7 DECALS
Place WARNING and CAUTION decals on instrument panel in plain view of operator and on
body and hoist. See goldenrod sheet B72952-1275 for placement.
CAUTION
!

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SECTION 2 — INSTALLATION INSTRUCTIONS
FIGURE 2 - DRIVE LINE RECOMMENDATIONS
FIGURE 3 - SCHEMATIC OF HYDRAULIC CIRCUIT