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Maintenance technicians use pullers to remove a component such as a gear, a pulley, or a bearing from a shaft or hole. Pullers are available in various styles and can be used in different situations. In this chapter, you will learn about different types of pullers and their uses. You will also learn how to select the right puller for the job, use various types of pullers, and provide the proper care of the pullers to keep them in good working condition.
When you have completed this chapter, you will be able to:
The universal gear puller (Figure 15-1) is usually of yoke and screw construction with two jaws. The jaws have a capacity from 0 to 14 inches in diameter. The universal gear puller is used for pulling gears, pulleys, and wheels.
Figure 15-1 � Universal gear puller.
The gear and bearing puller (Figure 15-2) is used to pull gears, bearings, pinions, sheaves, pulleys, and wheels. It is a screw-type puller with two or three jaws. The grip tightens as the pull increases. The gear and bearing puller has a maximum spread of 5 1/2 inches.
Figure 15-2 � Gear and bearing puller.
The universal bearing and bushing puller (Figure 15-3) has interchangeable jaws. The puller provides a pulling capacity up to 1 1/4 inches. The larger jaws are used for removing bronze or Oilite� bushings without crumbling them. The smaller jaws are used to pull clutch pilot bearings.
Figure 15-3 � Universal bearing and bushing puller.
The electrical unit bearing puller (Figure 15-4) is used to pull bearings from shafts of electrical units. It is supplied with plates to fit a variety of unit constructions and to fit behind the particular shaft bearings to be pulled.
Figure 15-4 � Electrical unit bearing puller set.
The battery terminal and small gear puller (Figure 15-5) is a screw-type puller for use in close quarters. In addition to pulling battery terminals, it is used to pull small gears and bearings.
Figure 15-5 � Battery terminal and small gear puller.
The steering gear arm puller (Figure 15-6) is used for pulling steering gear arms. It can also be used for a wide variety of other pulling jobs. The clamp locks the puller on the arm, leaving both hands free for pulling.
Figure 15-6 � Steering gear arm puller.
The steering wheel puller (Figure 15-7) consists of all the units necessary to remove the steering wheel from early models of cars and trucks up to the present models.
Figure 15-7 � Steering wheel puller.
The push and pull puller set (Figure 15-8) is used in conjunction with a variety of attachments and adapters. The push and pull puller consists of a 13 1/2-inch steel bar, which is slotted to receive two 9 1/2- inch legs. A pressure screw in the center of the bar is 13 inches long. It has a diameter of 1 inch, and is threaded. The puller is universal and versatile. With the use of the bearing pulling attachment, bearing cup pulling attachment, sheave puller attachment, threaded adapters, step plate adapters, additional legs, and many other special adapters, this puller is capable of removing or replacing bearings, gears, pinions, pulleys, wheels, and bushings. The push and pull puller set has many uses.
Figure 15-8 � Push and pull puller set.
The cylinder sleeve puller (Figure 15-9) is used to pull cylinder sleeves from engine blocks. It is adjustable to provide clearance regardless of the position of the cylinder studs and to simplify centering the tool over the bore. This puller is used in conjunction with four adapter plates supplied with the puller. The combination is capable of pulling cylinder sleeves from 3 3/16- to 5 3/4-inches in diameter.
Figure 15-9 � Cylinder sleeve puller.
The slide hammer puller set (Figure 15-10) is a universal-type puller equipped with a two- and three-way yoke, three medium jaws for outside pulls and two small jaws for inside pulling. The small jaws can be inserted through a 1/2 inch opening. The capacity of the medium jaws is 6 1/4 inches. The slide hammer puller set includes a mounting attachment for removing solid components such as axles and wheel hubs. The slide hammer puller is also equipped with a locking feature, which holds the jaws open or locks them on the work.
Figure 15-10 � Slide hammer puller set.
The universal wheel puller set (Figure 15-11) consists of a body and drive assembly that receives three long jaws, three short jaws, or a special grooved hub set. The interchangeable jaws pivot and swing to any desired bolt circle. Tapered, right and left hand threaded stud nuts complete the set, all of which are carried in a metal case. The wheel puller set is capable of pulling any demountable wheel hub for any passenger car and most lightweight trucks.
Figure 15-11 � Universal wheel puller set.
A cotter pin puller (Figure 15-12) is an S-shaped tool used to install or to remove cotter pins. One end is used to insert through the cotter pins for extracting. The other end is used for spreading the cotter pin. The shank is beveled square for easy handling and for a firm grip. This type is 7 inches long.
Figure 15-12 � Cotter pin puller.
Blocks (Figure 15-13) are constructed for use with fiber line and wire rope. Wire rope blocks are heavily constructed and have a large sheave with a deep groove. Fiber line blocks are generally not as heavily constructed as wire rope blocks and have small sheaves with shallow, wide grooves that revolve on a pin.
Figure 15-13 � Blocks.
Blocks fitted with one, two, three, or four sheaves are often referred to as single, double, treble, and quadruple blocks, respectively. Blocks are fitted with a varying number of attachments, depending on their particular use. Some of the most commonly used fittings are hooks, swivel or loose side, sister hooks, shackles, eyes, and rings. Depending on the various combinations of blocks available to do the job, the mechanical advantage can be increased indefinitely.
All line used in rigging should be good grade manila or the equivalent, and all wire should be plow steel or the equivalent.
The chain assembly (Figure 15-14) is a heavy duty linked chain with a grab hook at one end and a ring at the other. The chain assembly is used for such applications as towing vehicles, slinging loads, and hauling objects. The chain assembly is available in a wide variety of lengths and link sizes depending on the nature of the use.
Figure 15-14 � Chain assembly.
The cable jaw grip (Figure 15-15) is used to tighten or stretch wires or cables for various operations. Examples of application include removing kinks or bends in cables, tightening cables on loads or bales, or for cleaning and oiling of cables. Cable grips, depending on their application, vary in size and design.
Figure 15-15 � Cable jaw grip.
Like the cable jaw grip, the tension puller (Figure 15- 16) is used to tighten or stretch cables. The tension puller has strong cable attached to a cable notch gear. At the end of the cable is a hook. This hook can be attached to the eyelet of the cable to be tightened. Tension is then applied to the cable by moving the tension handle in an up and down motion.
Figure 15-16 � Tension puller.
The trip wire grapnel (Figure 15-17) is a metal weight resembling three or four fish hooks, with a common shank ending in an eye. The hooks spread out in different directions at the other end of the shank. Attached to the eye portion of the shank is a marlin cord of varying length. The trip wire grapnel is designed to clear trails, tunnels, caves, and buildings of trip wires, booby traps, and mines. It fits into a 30 round magazine pouch between the magazines. A small tool is included to pop off the tips of the arms should sharp points be required.
Figure 15-17 � Trip wire grapnel.
The following steps describe how to use a gear and bearing puller properly:
Figure 15-18 � Using a gear and bearing puller.
| Warning Turn the pressure screw or nut slowly to prevent injury as the gear bearing is released. |
| Warning DO NOT slide the handle too rapidly. The gear may fly off and cause injury. |
The following steps describe how to use a slide hammer puller properly:
Figure 15-19 � Using a slide hammer puller set.
The following steps describe how to use a block properly:
Figure 15-20 � Using a block.
The following steps describe how to use a cable jaw grip properly:
Figure 15-21 � Using a cable jaw grip.
Use the following guidelines when working with pullers:
15-1. Which of the following types of pullers has a capacity of 14 inches in diameter?
15-2. Which of the following pullers can remove bronze bushings without crumbling them?
15-3. Which of the following types of pullers is used in close quarters?
15-4. Which of the following types of pullers is capable of pulling demountable wheel hubs from passenger cars?
15-5. The chain assembly is used for towing vehicles and which other application?
15-6. The cable jaw grip and tension puller are similar in what way?
5-7. The trip wire grapnel is designed to clear trails, tunnels, and caves of what hazard?
15-8. When using a slide hammer, what step must you accomplish first?
15-9. Grease should NOT be applied to what surface of pullers?
15-10.What substance should be applied to wooden parts of pullers?
15-11.Tackle that is used with blocks should meet what critical requirement?
Copyright � David L.
Heiserman
All Rights Reserved