www.ndm.no

ProPeller Shaft Puller SyStemSsafer and cost effective inspection and repair

oil & GaS

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marine

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SPecial ProductS Service

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www.ndm.no

Extensive engineering expertise combined with high level of customer focus and quality management makes us a reliable and innovative partner.

a Global SuPPlierYour trusted partner

Since the foundation in 1989 Norwegian Deck Machinery has grown to be a well known supplier of equipment for the marine and offshore market. Existing ways of doing operations can be improved by developing new and innovative equipment.

NDM has extensive experience in customized solutions. Throughout the years we have delivered a range of products that just started out as an idea or a problem and turned out to be a complete turnkey product.

Our typical projects are purpose-built mechanical equipment and structures for marine or offshore op-erations and onshore equipment like shipyard equip-ment and equipment for general mechanical industry.

We take care of the total process from idea to concept development through design and manufacturing and all the way on to delivery, installation, start up, training and lifelong service.

Our experienced engineers solves the most complex problems and always aim to find the most cost effective solution for our customer without compromising on quality.

We possess all the technical expertise and associated documentation requirements needed to meet CE-marking, NORSOK, NS5820, DNV and others.

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Safer operationsLess damage on shaft and propeller during the pulling operation. By using the propeller shaft puller system, the risk of damaging the shaft during the pulling op-eration is reduced to a minimum compared to doing it the traditional way with slings and shackles.

The shaft and propeller can be pulled out safely and quickly with high accuracy by continuously adjusting the support unit and puller unit from the control position.

Increased personnel safety and HSERisk of personnel injuries during operation is reduced to a minimum since the entire operation is done with less personnel and without man driven hoist.

Faster Repair and InspectionThe shipyard can reduce the time needed with up to 90% by using the propeller shaft puller system. The whole operation is normally done in just a few hours.

Cost saving for shipyardThe traditional way with slings and shackles often takes several days and require double of personnel. By using the propeller shaft puller system the hours and number of personnel are reduced to a minimum.

Cost saving for shipownerReduced time in dock – reduced loss in off hire cost for the ship owner.

Other advantages• Can be delivered with equipment for taking down thrusters• Low maintenance• Easy to stow away• Quick and Easy to install before use• Easy to move from one dock to another• Short payment period on investment. (Depending on activity at the repair yard.)

advantaGeS uSinG ProPeller Shaft Puller SyStemS comPared to traditional methodS

Safer, faSter and coSt effective inSPection & rePair

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special products

FEatuRES StaNDaRD MODEl (30 – 50T SWL)

The standard propeller shaft puller system consists of a puller unit,

a fork for taking down rudders and one ore more support units.

Depending on configuration, SWL is ranging from 30 – 50TSWL.

All units are quickly installed and connected prior to a propeller

shaft pulling operation. When not in use, the system is easily

stowed away.

The puller unit and support unit(s) can be adjusted in vertical

and horizontal direction and are easily operated from the

control valves on the puller unit.

The puller system can be delivered with equipment for taking

down thrusters.

Standard SyStem 30 - 50t

PuLLER uNiT

lifting capacity: 20 T

Driving length, standard: 20 m

Working envelope, Vertical: 1,5-4,0 m

Working envelope, Horizontal: +/- 75 mm

SuPPORT uNiT:

load capacity: 20 T

Working envelope, Vertical: 2,0–3,5 m

Working envelope, Horizontal: +/- 200 mm

• 1 puller unit

• 1(2) support unit(s)

• 1 Fork for taking down rudders up to 6T

• 1 HPu

• 1 Control system

• Standard A75 railtrack (Customer supply)

Approx. power consumption: 20 kW, 400V/60Hz

The propeller shaft puller system is operated by a fixed hydraulic

control panel (station) placed on the propeller shaft puller unit.

The Propeller shaft puller unit and support units are quipped with

lifting eyes placed in each corner for balanced

lifting of the units on to the rail system.

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length of trolley 4865 mm

Width of trolley 2200 mm

Height of trolley (lowered) 2430 mm

Maximum lifting height 4000 mm

total weight 4364 Kg

Distance between wheels: 2000 mm

longitudinal 4500 mm

Width of rail track 2000 mm

Height from floor to center Front plate (lowered) 1500 mm

Max tilting of front plate 53,5 °

Sideway adjustment of front plate ± 150 mm

Max. lifting capacity 20 tons

Max pulling force 4 tons

travelling speed 0-9 m/min

Pull arrangement Traction winch

Hydraulic system HPu placed on Puller unit

Control system 1 off Control panel placed on HPu is included

Starter cabinet 1 off starter cabinet

Rails Regular A75

PROPEllER SHaFt PullER uNIt

length of trolley 1740 mm

Width of trolley 2300 mm

Height of trolley (lowered) 2100 mm

Height of trolley (lifted) 3600 mm

total weight 2576 Kg

Distance between wheels: 1574 mm

longitudinal 2200 mm

Width of rail track 2000 mm

Working Envelope Vertical 2,0 -3,5m

Working envelope Horizontal ± 200 mm

Max. load capacity 20 tons

SuPPORt uNIt

Rail type Standard A75

length According to customer requirements

The fork is mounted on the propeller unit.

length 3370 mm

Width 1270 mm

Height 1541 mm

total weight 730 Kg

Max lifting Capacity 6 tons

RaIl SyStEM (CuStOMER SuPPly)

FORk FOR takINg DOWN RuDDERS

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special products

FEatuRES laRgE SyStEM (50 – 80T SWL)

For doing propeller shaft pulling operations on larger ships, NDM

has developed a larger propeller shaft puller system consisting of

a puller unit and two off combined support/rudder removal units

suitable for taking down rudders up to 40T

in addition the system can be delivered with equipment for taking

down thrusters. Depending on configuration, SWL of the system

is ranging from 50 – 80T SWL. All units are quickly installed and

connected prior to a propeller shaft pulling operation. When not

in use the system is easily stowed away.

The puller unit and support unit(s) can be adjusted in vertical

and horizontal direction and are easily operated from the control

valves on the puller unit.

larGe SyStem 50 - 80t

PuLLER uNiT

lifting capacity: 30 T

Driving length, standard: 26 m

Working envelope, Vertical: 2,5 - 5,0m

Working envelope, Horizontal: +/- 150mm

SuPPORT uNiT:

load capacity: 30 T

Working envelope, Vertical: 1,4 – 3m

Working envelope, Horizontal: +/- 200mm

• 1 puller unit

• 1 (2) support/rudder removal unit(s)

• 1 HPu

• 1 Control system

• A75 railtrack (Customer supply

Approx. power consumption: 20 kW, 400V/60Hz

The propeller shaft puller system is operated by a fixed hydraulic

control panel (station) placed on the propeller shaft puller unit.

The Propeller shaft puller unit and support/rudder units are

quipped with lifting eyes placed in each corner for balanced

lifting of the units on to the rail system.

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length of trolley 5364 mm

Width of trolley 3316 mm

Height of trolley (lowered) 2501 mm

Maximum lifting height 5031 mm

total weight 8890 Kg

Distance between wheels:

longitudinal 4950 mm

Width of rail track 3000 mm

Height from floor to center : Front plate (lowered) 1500 mm

Max tilting of front plate 53,5 °

Sideway adjustment of front plate ± 150 mm

Max. lifting capacity 30 tons

Max pulling force 10 tons

travelling speed 0-9 m/min

Hydraulic system HPu placed on Puller unit

Control system 1 off Control panel placed on HPu is included

Starter cabinet 1 off starter cabinet

Rails Regular A75

PROPEllER SHaFt PullER uNIt

This unit is designed to function as a support unit during the pulling operation, but by taking off

the upper part, the unit can easily be transferred into a unit for taking down rudders up to 40 tons.

important: Two off support units are needed in order to obtain stability during removal of

rudders up to 40 Tons.

length of trolley 1764 mm

Width of trolley 3420 mm

Height of trolley (lowered) 3028 mm

total weight 4221 Kg

Distance between wheels: longitudinal 1100 mm

Width of rail track 3000 mm

Height from rail to base of u frame (lowered) 420 mm

Height from rail to top of u frame (lowered) 2500 mm

Height from rail to base of u frame (lifted) 1420 mm

Height from rail to shaft cradle In top position 3028 mm

Sideway adjustment of u frame ± 200 mm

Max. lifting capacity 30 tons

Max pulling force 10 tons

Rudder fixation system manually operated

Rudder Fixation arms 4 off.

A larger rail system can be required to get

the acquired height for operations. The large

rail system is customer supply, and based on

standard A75 rails. Drawings are included in

NDM`s delivery.

Number of Sections 2 Off

length of front section 12500 mm

length of front section 13525 mm

Width of each section 3480 mm

Height to top of rail 975 mm

Capacity 90T (metric)

total Weight, front section 10043 kg

total Weight, rear section 10336 kg

Rail type A75

SuPPORt / RuDDER REMOVal uNIt

laRgE RaIl SyStEM

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special products

SyStem deScriPtion

the standard system is delivered with a fork for removal of rudders up to 6T.

The fork is mounted on to the puller unit and the rudder is taken down by help of the

lifting lugs on the fork and slings.

The rudder is lifted off and placed on the side until the operation is completed.

the large system has an integrated rudder removal function in the support units which can

take down rudders up to 40T. Please note that two support units are needed for this operation

The support units are locked to the rail, by using the rail clamps. The u-frame is lifted up

until the rudder rests on it and the fixation arms are tightened up clamp the rudder to the

u-frame.

When the rudder is disconnected from the rudder stock, the support units can be lowered to

the bottom position before the operator takes them out in the crane coverage area.

the rail track is set up as a prolongation of the propeller shaft axis - sufficiently beyond

the propeller hub to make sure the front plate of the shaft puller can be brought in contact

with the propeller hub.

The shaft puller is lifted on to the rails, connected, wire is tightened and the HPu is

started. Support unit(s) can be placed on the rails now or later depending on operation.

RuDDER REMOVal

PREPaRatION

Both the standard and the large system are designed for rails

and delivered with hydraulic driven units that are adjustable in

horizontal and vertical direction.

The main difference is the total SWL and the way of removing

the rudder prior to the pulling of the shaft.

The propeller shaft puller unit is the main part of both systems.

One or two support units completes the system depending on

length of shafts. The rails are customer supply and length is

made according to customer needs. The equipment can easily

be stowed away when the job is finished.

The operator runs the entire operation from the control central

on the propeller shaft puller unit. The shaft is pulled out safely

and quickly without man driven hoist.

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After the shaft puller is placed in position by operating the control valves, the propeller

hub is strapped to the front plate.

When the shaft coupling is disconnected (between the propeller shaft and gearbox) the

operator can start pulling the shaft outwards whilst constantly adjusting the boom height

and front plate to keep the shaft in centre of the shaft bushing.

When the shaft has been brought out to an extent where support is needed the support

unit is lifted. For longer shafts use two support units.

The entire process is reversed to put the shaft back in and the rudder back in place.

SHaFt REMOVal

tHRuStER REMOVal

NDM has developed equipment for taking out thrusters. The equipment is

connected to the propeller shaft front plate using the same principle as the

fork for taking down rudder.

Shaft removal with the 20 T standard system

Norwegian Deck Machinery aSulvenvegen 34, N-5210 Os, Norway Phone: +47 56 30 32 80Fax: +47 56 30 32 82E-mail: office@ndm.noWeb: www.ndm.no

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