Engine cylinder sleeve puller and method

Claim 3

The method of claim 1 and further comprising the steps of: placing at least one of the jaws adjacent a shoulder on said surface immediately radially outside a wear ridge in said surface of the cylinder tube.

Claim 4

The method of claim 2 wherein the step of engaging the jaw with the ridge comprises: abutting engagement of the lower face of the ridge with the upper face of the jaw as the upper face faces the support member of the puller.

Claim 5

The method of claim 3 and further comprising the steps of: prior to mounting the puller support member, removing a cylinder head from the cylinder block; and prior to engagement of the shoulder, the step of moving the piston down in the cylinder tube away from the shoulder to provide space to admit the puller jaw.

Claim 6

The method of claim 2 comprising the step of: turning a jaw expander bolt in the cylinder to spread the two jaws apart from one another diametrically of the cylinder to thereby forcibly and rigidly urge them diametrically outward against the inner cylindrical wall of the cylinder tube immediately under the ridge formed by wear of the cylinder tube.

Claim 7

The method of claim 1 and further comprising the step of: pulling the tube from the block; and then pulling the piston from the hole in the block vacated by the tube.

Claim 8

A puller for cylinder sleeves comprising: a drawbolt; a bolt support member mountable over a cylinder opening; a tube engaging member mountable in the cylinder tube and having two diametrically opposed jaws with arcuate wall-engaging outer surfaces on each jaw subtending arcs of at least 90° for each jaw, said jaws being engageable with an inwardly extending ridge in the tube for interference engagement therewith; one of said members being threadedly received on the drawbolt to enable mechanically closing the space between said members by relative rotation between said one member and the drawbolt to forcibly pull the tube engaging member toward the support member and thereby pull the tube from the block, said tube engaging member including means operable independently of said drawbolt for moving said jaws radially outward and preventing inward movement with respect to a center line colinear with the axis of said bolt.

Claim 9

A puller for cylinder sleeves comprising: a drawbolt; a bolt support member mountable over a cylinder opening; a tube engaging member mountable in the cylinder tube and having two diametrically opposed jaws with arcuate wall-engaging outer surfaces on each jaw subtending arcs of at least 90° for each jaw, said jaws being engageable with an inwardly extending ridge in the tube for interference engagement therewith; one of said members being threadedly received on the drawbolt to enable mechanically closing the space between said members by relative rotation between said one member and the drawbolt to forcibly pull the tube engaging member toward the support member and thereby pull the tube from the block, said tube engaging member including means operable independently of said drawbolt for moving said jaws radially outward and preventing inward movement with respect to a center line colinear with the axis of said bolt.

Claim 10

The puller of claim 7 wherein: said tube engaging member includes an "H" bar having threads threadingly receiving the drawbolt, with said jaws being adjustably separable diametrically with respect to said center line for engaging opposite walls of a tube to be pulled from a block.

Claim 11

The puller of claim 8 and further comprising: a pair of adjustment screws each having threads at one end and a pilot portion at the other end, the thread of one screw being threadedly received in one of said jaws and the thread of the other screw being threadedly received in the other of said jaws, said screws having pilot portions thereof opposite the threaded portions received in pilot holes of the jaws opposite those in which they are threadedly received.

Claim 12

The puller of claim 9 wherein said "H" bar includes a pair of aligned outwardly opening slots on opposite sides of the axis of the draw bolt, each slot receiving a cap screw securing the jaw member to the "H" bar.

Claim 13

The puller of claim 10 and further comprising: a pair of feet mountable on opposite sides of the tube to be withdrawn, and atop the cylinder block; a pair of legs secured in said feet and upstanding therefrom; said support member being a bridging bar bridging the horizontal space between said legs and secured to the top of said legs, providing a support beam over the cylinder tube for the draw bolt.

Claim 14

The puller of claim 7 wherein said arcuate outer surfaces of said jaws are cylindrical faces subtending arcs of at least 120° for each jaw.