Item 10 hookliftmech.doc

HOOK LIFT HOIST MECHANISM & HYDRAULICS

Item 10

HOOK LIFT HOIST MECHANISM & HYDRAULICS

1. LIFTING CAPACITY

_____ 1.1 Swaploader Model SL400 or Stellar Shuttle model #138 or approved equal.

_____ 1.2 Hook lift and dump capacity rated at 40,000 lbs. capacity minimum.

_____ 1.3 Dump angle minimum 58°.

_____ 1.4 Hook lift must be capable of handling skid mounted containers and bodies with subframe lengths of 14 thru 18 feet.

_____ 1.5 Hook to rear roller shall be 14’.

_____ 1.6 Rear flange rollers shall be 6¼” diameter.

2. HOIST MAINFRAME

_____ 2.1 Mainframe of hoist shall be Z rail construction.

_____ 2.2 Mainframe shall be constructed of ¼” grade 50 steel.

_____ 2.3 Hoist Z frame rails shall include a minimum of four per side 11 ¾”x 2¾”x 12” Nylatron wear pads at the front of the Z for body/container support.

3. HYDRAULICS

_____ 3.1 Additional hydraulically powered equipment a 6.1 CID load sense pump Rexroth model A10V100.

_____ 3.2 Minimum 40 gallon frame mounted reservoir with fluid level sight glass.

_____ 3.3 Removable tank fill screen.

_____ 3.4 200 mesh, 74 micron pickup screen strainer.

_____ 3.5 Exterior screw on ten micron return filter.

_____ 3.6 Stackable control valves mounted outside the cab on the chassis in a weatherproof enclosure.

_____ 3.7 System shall have an integral 3500 PSI relief valve.

_____ 3.8 Dual control levers mounted in cab. Quadco Model C-81 levers with Tuthill Corp. Cabelcraft Model 1846 MT92 stainless steel armored and sealed cables of appropriate length.

_____ 3.9 Audible hoist alarm.

4. HOOK LIFT SYSTEM

_____ 4.1 Dump/load cylinders must be double acting, dual lift sized for specified capacity and a reserve with counter balance valves.

_____ 4.2 Dump/load cylinders must be 6” bore X 60” stroke minimum.

_____ 4.3 Telescoping jib shall be double acting single cylinder with counter balance valve and 4” bore X 38” stroke.

_____ 4.4 All cylinders must be double nitrided.

_____ 4.5 Jib must be capable of hydraulically sliding the body/container horizontally on the chassis without lifting to adjust weight distribution while remaining in the body locks.

_____ 4.6 System must have a hydraulic lockout valve to prevent jib operation while in dump mode.

_____ 4.7 Jib hook must be capable of reaching rearward to A-frame eye by double articulating hinge points in the hoist mechanism.

_____ 4.8 All lift sections must lock into a common rigid full length frame to support the body/container when dumping.

_____ 4.9 Locking must be accomplished by positive mechanical latches to lock the mast. Gravity or hydraulic locks are unacceptable.

_____ 4.10 Must be equipped with integral slide through lock down plates to secure the body to hook lift in dump and/or transport condition.

_____ 4.11 Body locks must accommodate for different length bodies and allow for weight distribution changes when in transport or dump cycle, while remaining in body locks.

_____ 4.12 Body/container must be supported by one pair of outside flanged rollers at the rear of the hoist.

_____ 4.13 Rear flanged roller width must be adjustable to accommodate bodies with outside subframe rail width of 40 ½” to 41 ¾”.

_____ 4.14 Hook lift mechanism must be able to accept hook lift subframes currently in use by MaineDOT without modifications to locking mechanisms, etc.

5. HOOK ASSEMBLY

_____ 5.1 Hook height 61 ¾” from bottom of long sills to bottom of hook.

_____ 5.2 Hook lift must be able to lift body or container from 21” below grade.

_____ 5.3 Jib hook designed to secure body to hoist without need of a safety latch.

_____ 5.4 Jib shall be of rigid design constructed of 9”x 9”x ½” wall square tube.

_____ 5.5 Body/container A-frame must be constructed to allow hook lift to engage 60° off center.

6. FENDERS

_____ 6.1 Full rear fenders and mud flaps must be provided and installed on the truck chassis.

7. TRUCK BUMPER/PINTLE

_____ 7.1 Rear tail stock must allow for paver and shoulder box applications.

_____ 7.2 A heavy duty 40,000 lb. pintle hitch, swivel hook style, and D rings shall be installed and must not interfere with the hook lift system.

8. GENERAL

_____ 8.1 Complete MVSS lighting including stop, tail, turn and backup must be mounted at the sides and rear as appropriate to eliminate the need of electrical connections to the body.

_____ 8.2 Must be coated with lead free paint.

_____ 8.3 A service repair and parts manual must be provided.

_____ 8.4 An operator’s manual must be provided.

_____ 8.5 Special Note: Any and all hook lift subframes offered in response to this specification must be entirely compatible and interchangeable with all the hook lift hoist mechanisms and hook lift subframes currently in use by MaineDOT without modifications to locks etc.

APP/kad 12/12/11 d:hookliftmech.doc

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