Vestil HDD Series User manual

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HDD-Series Hydraulic Drum Dumpers
Instruction Manual
Receiving instructions:
After delivery, remove the packaging from the product. Inspect the product closely to determine whether it
sustained damage during transport. If damage is discovered, record a complete description of it on the bill of
lading. If the product is undamaged, discard the packaging.
NOTE:
The end-user is solely responsible for confirming that product design, installation, use, and maintenance
comply with laws, regulations, codes, and mandatory standards applied where the product is used.
Table of Contents Table of Figures
Product Specifications……………………........... 2-3 FIG. 1: HDD-36-S exploded parts diagram……………….. 5
Signal Words……….……………….....................4 FIG. 2: HDD-48-S exploded parts diagram……………….. 5
Safe Use Recommendations……...................... 4 FIG. 3: HDD-60-S exploded parts diagram……………….. 6
Installation Instructions…………………………... 11 FIG. 4: HDD-72-S exploded parts diagram……………….. 6
Loading the Dumper………………………………11 FIG. 5: HDD-36-P exploded parts diagram..………..…….. 7
Inspections…………………………………………11-12 FIG. 6: HDD-48-P exploded parts diagram……………...... 8
Power unit operation……………………….......... 12-13 FIG. 7: HDD-60-P exploded parts diagram……………...... 9
Troubleshooting guide…………………………… 23 FIG. 8: HDD-72-S exploded parts diagram……………..... . 10
Labeling Diagram…….……………………………24 FIG. 9: Hydraulic Circuit Diagram………………………..... . 13
Limited warranty………………………………….. 25 FIGS. 10A-10F: Electrical Circuit Diagrams………………..14-19
FIG. 11: Motor Lead Diagrams & Transformer diagram…. 20
FIGS. 12A-12B: Modular Power Unit parts diagram…….. . 21-22
Vestil Manufacturing Corp.
2999 North Wayne Street, P.O. Box 507, Angola, IN 46703
Telephone: [phone] -or- Toll Free [phone]
Fax: [phone]
Web: www.vestilmfg.com e-mail: [email protected]

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Product Specifications:
Dimensions and other product attributes appear in the diagrams and table below:
Model A B C D E F Capacity Net weight
HDD-36-7-S 36” 93/4” 14” 60” 953/4” 611/2750 lb. 709 lb.
HDD-36-10-S 36” 93/4” 14” 60” 953/4” 611/21,000 lb. 727 lb.
HDD-36-15-S 36” 93/4” 14” 60” 953/4” 611/21,500 lb. 786 lb.
HDD-48-7-S 48” 93/4” 14” 72” 116” 711/2750 lb. 800 lb.
HDD-48-10-S 48” 93/4” 14” 72” 116” 711/21,000 lb. 792 lb.
HDD-48-15-S 48” 93/4” 14” 72” 116” 711/21,500 lb. 814 lb.
HDD-60-7-S 60” 93/4” 14” 84” 1363/4” 80” 750 lb. 988 lb.
HDD-60-10-S 60” 93/4” 14” 84” 1363/4” 80” 1,000 lb. 942 lb.
HDD-60-15-S 60” 93/4” 14” 84” 1363/4” 80” 1,500 lb. 937 lb.
HDD-72-7-S 72” 91/2” 131/2” 951/4” 1571/4” 92” 750 lb. 1,113 lb.
HDD-72-10-S 72” 91/2” 131/2” 951/4” 1571/4” 92” 1,000 lb. 1,055 lb.
HDD-72-15-S 72” 91/2” 131/2” 951/2” 1571/4” 92” 1,500 lb. 1,036 lb.
Stationary (bolt-down) HDD models

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Model A B C D E F Capacity Net weight
HDD-36-7-P 36” 93/4” 14” 633/4” 96” 611/2” 750 lb. 788 lb.
HDD-36-10-P 36” 93/4” 14” 633/4” 96” 611/2” 1,000 lb. 763 lb.
HDD-36-15-P 36” 93/4” 14” 633/4” 96” 611/2” 1,500 lb. 776 lb.
HDD-48-7-P 48” 93/4” 14” 721/2” 1163/4” 711/2” 750 lb. 864 lb.
HDD-48-10-P 48” 93/4” 14” 721/2” 1163/4” 711/2” 1,000 lb. 862 lb.
HDD-48-15-P 48” 93/4” 14” 721/2” 1163/4” 711/2” 1,500 lb. 880 lb.
HDD-60-7-P 60” 93/4” 14” 841/2” 1371/4” 80” 750 lb. 1,019 lb.
HDD-60-10-P 60” 93/4” 14” 841/2” 1371/4” 80” 1,000 lb. 1,042 lb.
HDD-60-15-P 60” 93/4” 14” 841/2” 1371/4” 80” 1,500 lb. 1,026 lb.
HDD-72-7-P 72” 91/4” 131/2” 96” 1571/2” 92” 750 lb. 1,034 lb.
HDD-72-10-P 72” 91/4” 131/2” 96” 1571/2” 92” 1,000 lb. 1,100 lb.
HDD-72-15-P 72” 91/4” 131/2” 96” 1571/2” 92” 1,500 lb. 1,115 lb.
Portable HDD models

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Signal Words:
This manual uses SIGNAL WORDS to indicate the likelihood of personal injuries, as well as the probable seriousness
of those injuries, if the product is misused in the ways described. Other signal words call attention to uses of the
product likely cause property damage. The signal words used appear below along with the meaning of each word:
Identifies a hazardous situation which, if not avoided, WILL result in DEATH or SERIOUS
INJURY. Use of this signal word is limited to the most extreme situations.
Identifies a hazardous situation which, if not avoided, COULD result in DEATH or SERIOUS
INJURY.
Indicates a hazardous situation which, if not avoided, COULD result in MINOR or
MODERATE injury.
Identifies practices likely to result in product/property damage, such as operation that might
damage the product.
Safe Use Recommendations:
We strive to identify all hazards associated with the use of our products. However, material handling is dangerous and
no manual can address every risk. Ultimately, the most effective way to avoid injury is to exercise sound judgment
whenever using this product.
Improper or careless operation of this drum dumper might result in serious personal injuries.
Failure to read and understand the entire manual before assembling, using or servicing the product
constitutes misuse.Read the manual whenever necessary to refresh your understanding of proper use and
maintenance procedures.
ONLY use the dumper as a means for mechanically emptying drum. ALWAYS properly load the dumper
according to the directions on p. 11.
DO NOT use a damaged dumper. Examples of structural damage include: broken container restraining tube,
broken fork pockets, and holes caused by rust or corrosion. Inspect the dumper before each use according to the
inspection instructions on p. 11-12. DO NOT use the HBD unless it passes every element of the inspection, or until
authorized maintenance personnel approve the dumper for service.
Inspect the unit before each use according to the inspection instructions on p. 11-12.
DO NOT stand beneath or travel under the dumper chute while it is elevated.
DO NOT use this dumper UNLESS every label shown in the “Labeling diagram” on p. 24 is in place, undamaged,
and easily readable.
DO NOT exceed the capacity of the dumper. The capacity of each model appears in the tables on pp. 2-3 as well
as on label 287 (see “Labeling diagram” on p. 24). The weight of the container to be dumped plus the weight of its
contents must not exceed the capacity.
DO NOT modify the dumper in any way UNLESS you first obtain written approval from Vestil. Modifying the
dumper without first receiving approval automatically voids the limited warranty and might make the dumper unsafe
to use.
DO NOT fill the hydraulic system with brake fluid or jack oils. Only fill the hydraulic system with
either anti-wear hydraulic oil, viscosity grade 150 SUS at 100°F (ISO 32cSt at 40°C) or Dexron transmission fluid.

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FIG. 1: HDD-36-S series stationary dumpers exploded parts diagram and bill of materials
Item
Part no. Description Qty.
Item
Part no. Description Qty
1 09-512-001 Hinge block assembly 2 8 36102 Hex nut, grade A, zinc-plated,
1
/4” - 20 1
2 99-021-909-001 Hydraulic cylinder, 2
1
/2” x 18” 1 9 22805 Elevator bolt, limit switch 1
3 09-537-013 Assembly, drum clamp, casting 2 10 09-545-028 Weldment, subassembly, chute 1
4 37039 Nylock nut, zinc-plated,
3
/4” – 10 4 11 12365
3
/4” – 10UNC x 3” zinc-plated #5 bolt 4
5 24-612-003 Pin assembly, cylinder 1 12 99-158-008 Modular power unit, no push buttons 1
6 09-145-020 Threaded pipe cap 2 13 09-514-131 Weldment, frame, stationary 1
7 01-022-021 Switch, limit, roller arm 1
Item Part no. Description Quantity
1 09-514-129 Weldment, frame,
stationary
1
2 09-512-001 Hinge block assembly 2
3 99-021-
909-001
Hydraulic cylinder, 2
1
/2”
x 18”
1
4 09-537-013 Assembly, drum clamp,
casting
2
5 37039 Nylock nut, zinc-plated,
3/
4
” – 10
4
6 24-612-003 Pin assembly, cylinder,
box dumper
1
7 09-145-020 Threaded pipe cap 2
8 01-022-021 Switch, limit, roller arm 1
9 36102 Hex nut, grade A, zinc-
plated, 1/
4
” - 20
1
10 22805 Elevator bolt, limit
switch
1
11 09-545-030 Weldment,
subassembly, chute
1
12 13365
3
/4” – 10 UNC x 3” zinc-
plated #5 bolt
4
13 99-158-008 Modular power unit
w/out push buttons
1
FIG. 2: HDD-48-S series stationary dumpers exploded parts diagram and bill of materials
Pivot
shaft
Pivot
shaft

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FIG. 3: HDD-60-S series stationary dumpers exploded parts diagram and bill of materials
FIG. 4: HDD-72-S series stationary dumpers exploded parts diagram and bill of materials
Item Part no. Description Quantity
1 09-514-127 Weldment, frame,
stationary
1
2 09-512-001 Hinge block assembly 2
3 99-021-
909-001
Hydraulic cylinder, 2
1
/2”
x 18”
1
4 09-537-013 Assembly, drum clamp,
casting
2
5 37039 Nylock nut, zinc-plated,
3/
4
” – 10
4
6 24-612-003 Pin assembly, cylinder,
box dumper
1
7 09-145-020 Threaded pipe cap 2
8 01-022-021 Switch, limit, roller arm 1
9 36102 Hex nut, grade A, zinc-
plated, 1/
4
” - 20
1
10 22805 Elevator bolt, limit
switch
1
11 09-545-031 Weldment,
subassembly, chute
1
12 13365
3
/4” – 10 UNC x 3” zinc-
plated #5 bolt
4
13 99-158-008 Modular power unit
w/out push buttons
1
Item Part no. Description Qty.
1 09-514-125 Weldment, frame,
stationary
1
2 09-512-001 Hinge block assembly 2
3 09-537-013 Assembly, drum clamp,
casting
2
4 37039 Nylock nut, zinc-plated,
3
/4”
– 10
4
5 24-612-003 Pin assembly, cylinder, box
dumper
1
6 09-145-020 Threaded pipe cap 2
7 01-022-021 Switch, limit, roller arm 1
8 36102 Hex nut, grade A, zinc-
plated, 1/
4
” - 20
1
9 22805 Elevator bolt, limit switch 1
10 09-545-032 Weldment, subassembly,
chute
1
11
99-021-909-001
09-021-018
Hydraulic cylinder:
21/2” x 18”
3” x 18” (HDD-72-15-S)
1
1
12 13365
3
/4” – 10 UNC x 3” zinc-
plated #5 bolt
4
13 99-158-008 Modular power unit w/out
push buttons
1
Pivot
shaft
Pivot
shaft

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FIG. 5: HDD-36-P series portable dumpers exploded parts diagram and bill of materials
Item Part no. Description Qty. Item Part no. Description Qty.
1 09-514-131 Weldment, frame, stationary 1 15 33012
1
/2” flat washer, low carbon, zinc finish 20
2 09-512-001 Hinge block assembly 2 16 12365
3
/4” – 10 x 3” HHCS #5 plain bolt 4
3 99-021-909-
001
Hydraulic cylinder, 2
1
/2” x 18” 1 17 16-132-262 6” x 2” glass filled nylon swivel caster 2
4 09-537-013 Assembly, drum clamp, casting 2 18 16-132-216 Caster, 8”, glass filled nylon 2
5 99-158-008 Modular power unit, no push buttons 1 19 09-525-009 Weldment, handle bracket, right 1
6 37039 Nylock nut, zinc-plated,
3
/4” – 10 4 20 16-025-028 Handle, push handles, chromed 1
7 24-612-003 Pin assembly, cylinder 1 21 09-525-008 Weldment, handle bracket, left 1
8 09-145-020 Threaded pipe cap 2 22 11055
5
/16”–18 x 1” HHCS #2 zinc-plated bolt 2
9 01-022-021 Switch, limit, roller arm 1 23 36104
5
/16”–18 grade A zinc-plated hex nut 2
10 36102 Hex nut, grade A, zinc-plated,
1
/4” - 20 1 24 99-612-001
3
/8”–16 x 5” bolt and nut combo. 2
11 22805 Elevator bolt, limit switch 1 25 09-016-169 Bracket, wheel 2
12 09-545-028 Weldment, subassembly, chute 1 26 11219
1
/2”–13 x 4” hex head bolt 10
13 08-025-008 4-handle bolt, 4” 2 27 16-111-003 Sleeve bearing for 2” wheel 8
14 37030
1
/2” – 13 nylon insert lock nut 10
Pivot
shaft

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FIG. 6: HDD-48-P series portable dumpers exploded parts diagram and bill of materials
Pivot
shaft
Item Part no. Description Qty. Item Part no. Description Qty.
1 09-512-001 Hinge block assembly 2 15 13365
3
/4” – 10 x 3” HHCS #5 plain bolt 4
2 99-021-909-
001
Hydraulic cylinder, 2
1
/2” x 18” 1 16 09-525-008 Weldment, handle bracket, left 1
3 09-537-013 Assembly, drum clamp, casting 2 17 09-525-009 Weldment, handle bracket, right 1
4 11219
1
/2”–13 x 4” hex head bolt 10 18 16-025-028 Handle, push handles, chromed 1
5 37039 Nylock nut, zinc-plated,
3
/4” – 10 4 19 16-132-216 Caster, 8”, glass filled nylon 2
6 24-612-003 Pin assembly, cylinder 1 20 16-132-262 6” x 2” glass filled nylon swivel caster 2
7 09-145-020 Threaded pipe cap 25 21 11005
1
/4”–20 x 1” HHCS #2 zinc-plated bolt 2
8 01-022-021 Switch, limit, roller arm 1 22 36104
5
/16”–18 grade A zinc-plated hex nut 2
9 36102 Hex nut, grade A, zinc-plated,
1
/4” - 20 1 23 09-016-169 Bracket, wheel 2
10 22805 Elevator bolt, limit switch 1 24 99-158-008 Modular power unit, no push buttons 1
11 09-545-030 Weldment, subassembly, chute 1 25 16-111-003 Sleeve bearing for 2” wheel 8
12 08-025-008 4-handle bolt, 4” 2 26 09-514-131 Weldment, frame, stationary 1
13 37030
1
/2” – 13 nylon insert lock nut 10 27 99-612-001
3
/8”–16 x 5” bolt and nut combo. 2
14 33012
1
/2” flat washer, low carbon, zinc finish 20

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FIG. 7: HDD-60-P series portable dumpers exploded parts diagram and bill of materials
Pivot
shaft
Item Part no. Description Qty. Item Part no. Description Qty.
1 09-512-001 Hinge block assembly 2 15 13365
3
/4” – 10 x 3” HHCS #5 plain bolt 4
2 99-021-909-
001
Hydraulic cylinder, 2
1
/2” x 18” 1 16 09-525-008 Weldment, handle bracket, left 1
3 09-537-013 Assembly, drum clamp, casting 2 17 09-525-009 Weldment, handle bracket, right 1
4 99-158-008 Modular power unit, no push buttons 1 18 16-025-028 Handle, push handles, chromed 1
5 37039 Nylock nut, zinc-plated,
3
/4” – 10 4 19 16-132-216 Caster, 8”, glass filled nylon 2
6 24-612-003 Pin assembly, cylinder 1 20 16-132-262 6” x 2” glass filled nylon swivel caster 2
7 09-145-020 Threaded pipe cap 2 21 11005
1
/4”–20 x 1” HHCS #2 zinc-plated bolt 2
8 01-022-021 Switch, limit, roller arm 1 22 36104
5
/16”–18 grade A zinc-plated hex nut 2
9 36102 Hex nut, grade A, zinc-plated,
1
/4” - 20 1 23 09-016-169 Bracket, wheel 2
10 22805 Elevator bolt, limit switch 1 24 16-111-003 Sleeve bearing for 2” wheel 8
11 09-545-031 Weldment, subassembly, chute 1 25 11219
1
/2”–13 x 4” hex head bolt 10
12 08-025-008 4-handle bolt, 4” 2 26 09-514-127 Weldment, frame, stationary 1
13 37030
1
/2” – 13 nylon insert lock nut 10 27 99-612-001
3
/8”–16 x 5” bolt and nut combo. 2
14 33012
1
/2” flat washer, low carbon, zinc finish 20

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FIG. 8: HDD-72-P series portable dumpers exploded parts diagram and bill of materials
Pivot
shaft
Item Part no. Description Qty. Item Part no. Description Qty.
1 09-512-001 Hinge block assembly 2 15 09-525-008 Weldment, handle bracket, left 1
2 09-537-013 Assembly, drum clamp, casting 2 16 09-525-009 Weldment, handle bracket, right 1
3 99-158-008 Modular power unit, no push buttons 1 17 11005
1
/4”–20 x 1” HHCS #2 zinc-plated bolt 2
4 37039 Nylock nut, zinc-plated,
3
/4” – 10 4 18 16-025-028 Handle, push handles, chromed 1
5 24-612-003 Pin assembly, cylinder 1 19 16-132-216 Caster, 8”, glass filled nylon 2
6 09-145-020 Threaded pipe cap 2 20 16-132-262 6” x 2” glass filled nylon swivel caster 2
7 01-022-021 Switch, limit, roller arm 1 21 36104
5
/16”–18 grade A zinc-plated hex nut 2
8 22805 Elevator bolt, limit switch 1 22 99-612-001
3
/8”–16 x 5” bolt and nut combo. 2
9 09-545-032 Weldment, subassembly, chute 1 23 36102 Hex nut, grade A, zinc-plated,
1
/4” - 20 1
10 08-025-008 4-handle bolt, 4” 2 24 09-016-169 Bracket, wheel 2
11 37030
1
/2” – 13 nylon insert lock nut 10 25 16-111-003 Sleeve bearing for 2” wheel 8
12 33012
1
/2” flat washer, low carbon, zinc finish 20 26 11219
1
/2”–13 x 4” hex head bolt 10
13
99-021-909-
001
09-021-018
Hydraulic cylinder:
21/2” x 18”
3” x 18” (HDD-72-15-P)
1
27 09-514-125
Weldment, frame, stationary 1
14 13365
3
/4” – 10 x 3” HHCS #5 plain bolt 4

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Installation instructions (stationary units):
Step 1: Position the dumper where
desired with a forklift.
Step 2: Drill holes approximately 4in.
(10cm) deep.
Step 3: Secure the dumper to the floor by
inserting 3/4” anchor bolts through
the bolt holes in the base frame.
Step 4: Shim and/or grout the sides of the
frame as necessary to achieve
levelness.
Step 5: (AC powered units) Connect the
power cord to the power supply.
Loading the dumper:
1. Use only properly sized waste containers: HDD-series dumpers are designed to accept 33 gallon and 55 gallon
steel, plastic, and fiber drums.
2. Load the drum onto the chute: Place the drum on the base plate of the chute. The drum should rest against the
back of the chute.
3. Apply the drum retainers (see diagrams in “Inspections” below): to prevent the drum from sliding out of the chute,
move the retainers up or down the rails as necessary and into solid contact with the top of the drum. To move the
retainers, press the rail clamps down. The hook at the end of each retainer must contact the inside wall of the
drum.
4. Dump the drum: press the white (raise) button on the pendant controller to raise the chute to the dumping
position. In response to the input from the controller, the piston extends and raises the bottom end of the chute.
The piston extends only while the operator presses the white button. When the button is released, the cylinder
stops extending and the chute stops moving. The chute maintains whatever position it is in when the button is
released.
NOTE: If the net weight of the drum and its contents exceeds the capacity of the dumper, a relief valve in the
hydraulic system will open. While the relief valve is open, the piston cannot extend. Consequently, the chute
will not move.
5. Return the chute to the loading position: press the black (lower) button on the controller to retract the piston. As
the piston retracts, it pulls the bottom end of the chute towards the ground. If the DOWN button is released before
the chute is completely lowered, the chute will maintain its position.
Inspections: (Refer to FIGS. 1-8, p. 5-10)
Before each use, inspect the listed components:
1. Modular power unit, pendant controller, and wiring: examine
all wires for frays, cuts, tears, etc. (DC-powered units) Check
battery charge status. Cycle the chute all the way up and all
the way down. Recharge the battery, if necessary.
2. Hydraulic system: check the reservoir and all hoses for
pinches, kinks, punctures, and leaks.
3. Drum retainers and clamp rails: examine the retainers for
damage including bends, cracks, and looseness. Each clamp
should maintain position along the rail (i.e. should not slide).
4. Frame: check the hinge blocks, pivot shafts, cylinder brackets
(at each end of cylinder at attachment points to the frame and
the chute), legs, vertical frame, and chute for cracks,
damaged welds, severe wear, and corrosion.
5. Cylinder and limit switches: verify normal function. Cycle the
chute through a complete dumping sequence (fully rotated
and back to the ground).When the chute reaches dumping
height, the power unit should stop running. The piston should
extend and retract smoothly without binding or jerking. Listen
for unusual sounds that might indicate binding or grinding
during operation and watch for unusual movement. If you
observe any unusual sound or movement, do not use the
3
/4” anchor bolt
3
/4” anchor bolt
Shim and/or grout
under the frame to
level the dumper
Retainer
rail
Drum retainer
Modular power unit
Leg
Chute
Vertical
frame
Drum retainers:
Rail clamp
Drum
retainer
Hook of retainer
should contact
inside wall of drum

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dumper until it has been restored to normal operating
condition.
At least once per month, inspect the dumper as follows:
1.Oil level: remove the cover from the modular power unit. Then, fully raise the chute (to the 45° “dumping position”)
and observe the level of oil in the reservoir. The surface of the oil should be 1 to 1½ inches below the fill hole. If
oil is needed, add oil as specified below in “Oil specifications”.
2.Pivot points: check the dumper for excessive wear. Pay particular attention to pivot points between hydraulic
cylinders and cylinder brackets, and between pivot shafts and hinge blocks.
3.Floor connection points: anchor bolts should prevent the frame from lifting off of the ground during chute
operation. Concrete around each anchor bolt should be intact, i.e. not cracked or chipped.
4.Fasteners: check each fastener connection (nuts, bolts, pins, etc.). Tighten loose connections. Replace all
damaged hardware.
5.Hydraulic hoses and electrical wires: check each wire and hose for damage (frays, kinks etc.).
6.Labels: labels should be easily readable, undamaged, and be affixed to the dumper as shown in the “Labeling
diagram” on p. 23.
Oil specifications: At least once per year change the hydraulic oil. Change the oil as soon as it becomes gritty or
looks milky (indicating that water is present). With the chute in the fully lowered position, drain the oil and replace it
with either Dexron transmission fluid or anti-wear hydraulic oil viscosity grade 150 SUS at 100°F (ISO 32 cSt at
40°C.
Power unit operation
The drum dumper is powered by an electric motor directly coupled to a gear pump. The pump pressurizes the
hydraulic fluid. Fluid pressure causes the piston of the hydraulic cylinder to extend. Piston extension causes the
bottom of the chute to rotate until it is elevated above the top of the chute. A hydraulic manifold bolted directly onto
the gear pump houses the hydraulic control components. Each component is rated for 3,000psi working pressure.
Important components of the power unit include:
Electric motor: the motor is either AC powered (wall socket) or DC powered (battery). AC-powered motors can be
wired for either single-phase or three-phase operation. Regardless of phase configuration, every motor is dual-
voltage capable.
Gear pump: the pump shaft is directly coupled to the shaft of the electric motor. Several displacements are
available to match the horsepower of the motor selected.
Check valve: prevents backflow of fluid through the pump and to the reservoir. Because fluid can only flow in
response to an electrical signal from the pendant controller, the chute can maintain any position between the
raised and lowered configurations.
Pressure relief valve: opens a path for fluid to flow back to the reservoir if fluid pressure exceeds 3,000psi.
Lowering solenoid valve: electrically-operated cartridge valve with an integral screen to keep contaminants from
entering the valve.
Pressure compensated flow control spool: this feature regulates the flow of hydraulic oil from the cylinder back to
the reservoir. It is located beneath the lowering valve. This component allows the table to lower at a
predetermined constant rate regardless of the weight of the dumper and contents. Several sizes are available.
Displacement style hydraulic cylinder: each cylinder includes a bleeder valve located at top end for removing air
from the hydraulic system.
Velocity fuse: a safety device installed in the hose port of each cylinder. If a hose is punctured while the unit is
operating, the velocity fuse closes automatically. The chute remains stationary until pressure is reapplied to the
system.
Hydraulic fluid: HO150 hydraulic fluid. To replenish the fluid, add anti-wear hydraulic fluid with a viscosity grade
of 150 SUS at 100°F (ISO 32 @ 40°C) like AW-32 or Dexron transmission fluid.
Sequence of operation:
To raise/tilt the chute, press the white (UP) button. In response, the motor turns and rotates the gear pump. As
the pump rotates, oil is drawn from the reservoir, passes through the suction filter, and enters the pump.
The gear pump propels oil through the check valve to the lift cylinder.
Releasing the white button during operation immediately halts chute movement. Additionally, an electrical upper
travel limit switch automatically turns off the motor when the chute reaches a 45° angle to the ground (horizontal).
To lower the chute, press the black (DOWN) button.
Lowering valve opens which bypasses the check valve and allows oil in the cylinder to flow to the reservoir
(through return hoses). Oil flow to the reservoir is regulated by the pressure compensated flow control valve. By
regulating the volume of oil that can flow through the spool, the speed at which the chute lowers is kept constant.
Releasing the DOWN button during operation causes all chute movement to stop. The chute will remain in the
same position until you press either button on the pendant controller.

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Cleaning lowering solenoid valve: If the chute slowly loses elevation without pressing the DOWN button, lower the
chute completely. Then, remove, inspect, and clean the lowering cartridge valve in the following manner:
1. Lower the chute completely and turn off electrical power to the unit. If your dumper is AC powered,
unplug the electrical cord from the wall socket. If your unit is DC (battery) powered, turn the power
switch to the OFF position.
2. Unload the dumper.
3. Remove the nut that fastens the solenoid coil to the valve stem; then remove the coil and unscrew the
valve from the manifold.
4. Inspect the valve for blockage.
5. Inspect O-rings and back-up washers for cuts, tears, etc.
6. Submerge the valve in mineral spirits or kerosene.
7. Use a thin tool, such as a small screwdriver or a hex wrench, to push the poppet in and out several
times from the bottom end of the valve. The valve should move freely, about 1/16” between the closed
and open positions. If the poppet sticks, the valve stem might be bent. Replace the poppet if it doesn’t
free up after cleaning.
8. Remove mineral oil from the valve with compressed air.
9. Move the poppet in and out.
10. Inspect the bottom of the valve cavity in the manifold for foreign matter.
11. With the thin tool, press the middle of the flow control spool, which is located in the bottom of the
cavity. It should move down and up smoothly.
12. Reinstall the valve in the manifold and tighten it to 20 lb·ft of torque.
Bleeding air from hydraulic system: If the chute lowers extremely slowly or does not lower, air in the cylinders
might be the culprit. Air in the hydraulic system causes the velocity fuse to close, which traps oil in the cylinder. To
overcome this problem, air must be “bled” from the system.
Completely lower the chute and unload it;
Locate the bleeder valve located at the top of the cylinder (it looks like a grease zerk). Hold a rag over the valve
and open it about a half turn with a 1/4” or 5/16” wrench. Oil and air will sputter from the valve. Jog the motor by
pressing the white (UP) button for just a second. If air continues to escape from the bleeder valve, jog the motor
several more times. Wait at least 5 seconds between successive jogs.
Close the valve once air no longer is heard or seen bubbling out of the valve. At this point, just a clear stream of
oil is seen flowing from the bleeder valve. Close the valve.
Remove the cover from the modular power unit and check the oil level in the reservoir. If the surface of the oil is
lower than 1 to 1½ in. below the fill hole, then add oil until it is between 1 and 1½ inches of the fill hole. Add only
anti-wear hydraulic fluid with a viscosity grade of 150 SUS at 100°F (ISO 32 @ 40°C) like AW-32 or Dexron
transmission fluid.
Item Part no. Description Quantity
1 01-127-010
Manifold, aluminum, w/o valves 1
2 01-135-052
2HP, 3-phase, 1725 RPM motor 1
3 01-143-908
Gear pump, 0.153 displacement 1
4 99-021-909
Cylinder, 2
1
/2” x 18” ram style 2
5 99-153-006
Relief valve, 210 bar, size 08 1
6 99-031-029
Inlet screen, 100 mesh 2” pancake
1
7 99-153-038
Flow control, PC,
7
/16” - 20, 2gpm 1
8 01-531-001
Velocity fuse, adjustable, brass 2
9 99-153-015
Valve, cartridge, NC, no coil, w/ nut
1
10 99-153-011
Check valve, size 08 1
11 99-023-002
Reservoir, L-shaped, 1.16 gal., 1.0
gal. nominal 1
FIG. 9: Hydraulic circuit diagram

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FIG. 10A: 115VAC, Electrical Circuit Diagram (09124017 Rev. D)
NOTE: In this diagram, all components are represented with the chute in “home” location, i.e. resting, lowered position.
NOTE: Overcurrent and short-circuit protection
should be provided by the end user in
accordance with recommendations and
requirements in NEC (NFPA 70) and
local codes.
115VAC,
3
/4 HP
12 FLA, 1725 RPM

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FIG. 10B: 115VAC, Upper & Lower Limit Switches, Electrical Circuit Diagram
(09124014 Rev. C)
NOTE: Overcurrent and short-circuit protection
should be provided by the end user in
accordance with recommendations and
requirements in NEC (NFPA 70) and
local codes.
NOTE: In this diagram, all components are represented with the chute in “home” location, i.e. resting, lowered
position.
115VAC,
3
/4 HP
12 FLA, 1725 RPM

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FIG. 10C: 208-230VAC, 1-phase, electrical circuit diagram (09124018 Rev. C)
NOTE: In this diagram, all components are represented with the chute in “home” location, i.e. resting, lowered
position.
208-230/460 VAC, 2 HP
7.8-6.2/3.1 FLA, 1725 RPM
-OR-
208-230/460 VAC, 2 HP
5.6/2.8 FLA, 3450RPM
NOTE: Overcurrent and short-
circuit protection should be
provided by the end user
in accordance with
recommendations and
requirements in NEC
(NFPA 70) and local
codes.

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FIG. 10D: 208-230VAC, Upper & Lower Limit Switches, 1-phase electrical circuit
diagram (09124015 Rev. C)
NOTE: In this diagram, all components are represented with the chute in “home” location, i.e. resting, lowered
position.
NOTE: Overcurrent and short-
circuit protection should be
provided by the end user
in accordance with
recommendations and
requirements in NEC
(NFPA 70) and local
codes.
Indicates wire and/or components
end-user must provide 208-230VAC, 1.5 HP
12 FLA, 1725 RPM

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FIG. 10E: 3-phase 208-230/460 VAC, electrical circuit diagram (09124019 Rev. C)
NOTE: In this diagram, all components are represented with the chute in “home” location, i.e. resting, lowered
position.
208-230/460 VAC, 2 HP
7.8-6.2/3.1 FLA, 1725 RPM
-OR-
208-230/460 VAC, 2 HP
5.6/2.8 FLA, 3450RPM
NOTE: Overcurrent and short-
circuit protection should be
provided by the end user
in accordance with
recommendations and
requirements in NEC
(NFPA 70) and local
codes.
Indicates wire and/or components
end-user must provide

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FIG. 10F: 3-phase 208-230/460 VAC, Upper & Lower Limit Switches, electrical
circuit diagram (09124016 Rev. C)
NOTE: Overcurrent and short-circuit
protection should be provided
by the end user in accordance
with recommendations and
requirements in NEC (NFPA
70) and local codes.
NOTE: In this diagram, all components are represented with the chute in “home” location, i.e. resting, lowered
position.
Indicates wire and/or components
end-user must provide
208-230/460 VAC, 2 HP
7.8-6.2/3.1 FLA, 1725 RPM
-OR-
208-230/460 VAC, 2 HP
5.6/2.8 FLA, 3450RPM

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FIG. 11: Motor lead connection diagrams for all 0.5HP, 0.75HP, & 3hp single-
phase motors and for all 2HP, 5.5HP, and 6.5HP three phase motors
Attach thermostat leads to:
1) Grounded side of the transformer secondary; and
2) Motor relay coil.
It does not matter which lead attaches to each location.
Transformer wiring diagram: