Models: Air

Subject: Value of Product

By:	Rich Ederle, Marketing
	Dick Pettelle, Engineering

No. UL-017

Date: 11/21/94

Frame 2 Hercu-link
12-1/2, 25, 37-1/2 and 50 Metric Tons

Value of Product-

Pendent  Handle	Inlet/  Exhaust Manifold
Spool  Valve	Radial  Piston Motor
Gearing	Sheave  Assembly
Brakes	Frame
Suspension	Trolley  Side Plates
Trolley  Wheels	Bottom  Block
Chain	Limit Switches

Pendent Handle - Standard is IR MLK handle. Standard (2) motor Fenner (4) lever handle.`

• For Marine applications - the handle is anodized. Standard spools are replaced with SS spools. Handle fittings are straight brass 37° pipe thread, reusable nipples with swivel - connectors. Each hose is color coded for easy identification of pendent/ hoist function.
• Six inches from the handles are brass quick exhaust valves. Small in diameter, these valves have a highly resistant Viton polymer valve seat. Valves are then positioned every 10 feet (3m).
• Accutrol weatherproof handle is an option.
• Simple on-off valve is optional on the Fenner pendent .
• Pendent control hose is 1/4" (6.4mm) 250 psi WP two braid, oil and ultra violet resistant.

Inlet / Exhaust manifold -cast channeled manifold  directs air to the coated valve. There are no external connections. The  cast manifold protects the smaller components. The trolley manifold is  off to the side and tucked in for protection.

Spool valve - precision honed fit between spool and sleeve. The spool valve was designed  specifically for the Herculink to provide excellent load and spotting  control.

Radial Piston motor - Five-piston motor. 9.4 hp. Rotary valve bushing is brass. Three oil  rings and one compression ring. Cast iron body and cylinder heads.

Gearing - 3 stage planetary gear system 176:1 fully splined throughout - no key ways. Alloy steel gears that are heat tested. Run in an oil bath. Enclosed in a steel housing.

Sheave Assembly  - Four pocket chain sheave is splined and supported by heavy duty hoist  rated bearings which are lubricated by the oil bath. "Quad"  seals prevent oil leakage. The bearings are sealed on the face as well  as the OD. Continuous testing and improvement match pocket wheel and chain.  The study of actual field performance, testing and design modification  over the years maximizes chain/sheave life.

Brakes - Spring applied air released with bronze piston and cylinder specially formulated to minimize porosity yet maintain the self lubricating properties of bronze. Six high strength die cast springs provide uniform breaking pressure. Four brake discs operate between five friction discs. When run in the up direction the brake requires about 40psi to operate. Two screws behind the brake allow emergency lowering if required. A sprag clutch (a roller bearing type device with triangular rollers that acts like a bearing in one direction and locks in the appropriate direction) is used to prevent slippage and provide immediate set.

Frame - Cast steel load bearing frame is pre-drilled for top and side mounting. The frame has replaceable chain wear inserts and chain stripper. These components guide the chain and prevent wear to the frame itself.

Suspension - The frame is attached to the suspension bar by four Grade 8 1 1/4" socket head cap screws. Two shafts that are turned and zinc plated fit into the bronze bushed yokes. This arrangement allows side to side articulation of the hoist. This articulation should be limited to 15 ° from center. The yokes have zinc plated round shafts that fit into the trolley side plates.

Trolley Side Plates - One and one-eighth (1-1/8") inch plate steel is used for the side  plates. Round steel strengtheners (or doublers) provide a greater support  area for the yoke. Side plates have lifting eyes in each corner. Rail  sweeps/safety lugs are equipped with rubber bumpers. Trolley guide rollers  (permanently sealed cam rollers) are built into the side plates. Adjustment  with machined spacers ensures proper fit and smooth running.

Trolley Wheels are steel. Drive wheels have hardened teeth. Trolley drive motor is a  1.1 hp motor driving through a 49.1 worm drive gear box and generates  20 fpm traverse speed. The gearbox is a bronze worm gear driven by a steel  worm. This worm gear drive has the added benefit of acting as a brake.  It runs in an oil bath in a sealed housing.

Bottom Block - Cast steel halves are bolted together with Grade 8 Allen head cap screws  and Allen nuts providing exceptional strength and smooth contour. Chain  sheave bearings are sealed with "quad" seals to keep out contaminants.  They are greasable from outside. Another grease fitting is provided to  lubricate the Timken hook thrust bearing. The hook is a Crosby high strength  alloy hook. The hook nut is a T design that rides on the thrust bearing  which allows easy hook swivel.

Chain - Our main chain supplier is Pewag of Austria. Both 16mm and 22mm wire diameter chain meet the German DIN5684-8. The "-8" indicates that it is a steel alloy with at least two alloying additions. The alloys are usually nickel, chromium, molybdenum or boron. Zinc plated chan is also available. A painted connector link is used every 20 meters.

Limit Switches - Up and down limit switches are mechanically linked to the spool valve  for positive shut-off. The up limit is activated by the lower chain block.  The down limit is activated by the chain tail end. Made of steel for durability  and toughness.