Artillery, towed

TM 746-10

(2) Obturator pad, rings, and disc. Preserve

(3) Recoil mechanism. Remove dust shield

the rings and disc per paragraph 4-101d. Unit pack

and coat accessible surface of chrome plated recoil

wrapped rings and disc submethod IA-8. Place bag and

sleeve with P-ll. Coat surface of recoil mechanism

obturator pad in a fiberboard box and close with plastic

immediately forward of breech coupling with the same

tape. Secure box to the weapon with filament tape and

type grease. Apply grease while gun launcher is out of

identify "obturator pad."

battery.

(3) Cannon tube. Process installed cannon

(4) Counter

recoil

buffer.

Without

per the appropriate instructions in paragraph 4-101.

disassembly, coat exposed, unpainted, machined

surfaces of the counter recoil buffer with P-ll1.

(4) Elevating and traversing gears.

Coat

(5) Processing replenisher.

Elevate gun

gears with P-1. Activate through the complete cycle to

evenly distribute the grease and reapply P-1 to the

launcher to 15 (265 mils). Check reservoir oil level

disturbed surfaces.

and, if required, fill to the l-quart mark with the oil

specified on the applicable lubrication order.

(5) Recoil mechanism. Preserve unpainted

(6) Elevating and traversing mechanism.

surfaces with P-ll.

Wrap preserved surfaces with

greaseproof barrier and secure with tape.

Coat exposed, unpainted surfaces of elevating

mechanism, trunnions, turret traversing ring gear, and

(6) Handwheels, handles, chains, etc.

elevating hand crankshaft with P-ll. Secure handle lock

Secure in place with wire.

pin and turret traverse lock in locked position.

(7) Fire control and sighting equipment.

(7) Turret ring bearing. Remove plugs from

Package per the general provisions of paragraph 4-101

grease fitting openings in turret ring bearing and install

and as otherwise indicated for individual components

grease fittings. Pump P-ll through grease fittings until

referenced in the topical index.

grease is visible between the two sections around the

f. Combat vehicle, gun, self propelled (Vulcan).

circumference of the ring. Rotate turret five times in

(1) General requirements. Lubricate chassis

both directions and again lubricate until all surfaces on

and gun mount per their lubrication order. Place radar

the circumference of the ring are lubricated. Remove

antenna unit in a towed position and secure. Ship the

grease fittings and reinstall plugs. Remove excess

gun with barrels assembled and mounted in place in a

grease from the outside surface of the rail.

horizontal position pointing directly forward and secure it

(8) Backrests and seats. Cover backrests

in the traveling lock provided. Retain generator set

and cushioned components of seats with waterproof

mounted in place.

Mount batteries with cables

barrier and secure in place with tape.

disconnected and secure in place with battery clamps

(9) Miscellaneous preservative application.

provided.

Except as otherwise specified herein, coat all exposed,

(a) Cleaning. Clean gun barrels per

unpainted, machined metal surfaces on the interior and

paragraph 4-101b(3).

exterior of the system with P-1.

(b) Preservative application. Apply P-9

(10) Processing and system vehicle. Clean

to all interior and exterior unpainted, ferrous metal

the power trains, brakes, suspension, steering, and all

surfaces except the azimuth, elevating gear drives,

other portions of the mobility aspects of the vehicle.

turret ring, which will be preserved with P-1l, and gun

Then dry and preserve per instructions contained in

and barrels. Activate gears through a complete cycle to

paragraph 3-3.

evenly distribute the preservative and reapply P-ll to the

e. Artillery, towed. Prepare towed artillery in a

disturbed surfaces.

towaway condition. Lower cannon to zero degrees

(2) Packaging.

elevation for cleaning and preservative application.

(a) Gun. Completely wrap the gun and

After cannon is cleaned and preserved, place weapon in

barrels in VCI and secure with tape. Overwrap the VCI

locked travel position. Inflate tires to 10 pounds above

with waterproof barrier and seal all edges with tape.

normal operating pressure. Apply P-1 to all unpainted

(b) Gun, mid-barrel clamp. Wrap with

metal surfaces not specifically covered herein.

VCI and secure with tape.

(1) Breech mechanism. Remove obturator

(c) Gun muzzle clamp. Wrap with VCI

pad, rings, and disc. Preserve interior and exterior

and secure with tape.

surfaces with P-ll. Insert

(d) Mount, XM157.

a wood spacer wrapped in greaseproof

(e) Dummy cartridges. Ensure that 100

barrier material in place of the removed obturator pad.

dummy cartridges are placed in the XM163 chute.

Ensure that spacer is 1 /4-inches thick and the

diameter fits the space of the breech mechanism. Close

the breech and wrap the mechanism with greaseproof

barrier material, securing with tape.

4-31