Heavy Duty Balanced Opposed Compressors - Ariel Corporation
Heavy Duty Balanced Opposed Compressors - Ariel Corporation Heavy Duty Balanced Opposed Compressors - Ariel Corporation
FOR MODELS: JGZ AND JGU SECTION 5 - MAINTENANCE Dial Indicator Magnetic Base Placement on Top of Main Bearing Cap Crankshaft - Removal Button Type Dial Indicator Placement against the side of Crankshaft Web Use Large Pry Bar against Compressor Frame for Thrusting Crankshaft Back & Forth FIGURE 5-12 MEASURING CRANKSHAFT THRUST CLEARANCE - TYPICAL 1. Operate the pre-lube pump to lubricate the bearings. 2. Drain the oil from the crankcase. 3. Remove the coupling center member. Remove the coupling hub. In order to remove the coupling hub it may be necessary to heat it. If the coupling hub is not removed, the drive end cover cannot be removed separately, and will need to be lifted out with the crankshaft. CAUTION!: DO NOT TOUCH HOT SURFACES WITHOUT PROPER INSULATION TO PREVENT INJURY. 4. Remove the top covers, gaskets, top cover and main bearing spacer bars, and drive end cover. Tip: If the spacer-bar cap screws are difficult to loosen, use a 12 point hammer wrench. Remove the RTD’s/thermocouples from the main bearing caps and place them so they will not be damaged when the crankshaft is being removed. 5. Be careful not to damage the sharp corners on each end of the top of the crankcase. These corners form the junction between the end covers, top covers, and base; thus they must be kept sharp and unmarred to prevent oil leaks. 7/09 PAGE 5 - 19
FOR MODELS: JGZ AND JGU SECTION 5 - MAINTENANCE 6. Detach the connecting rods. (See “Connecting Rod - Removal” on Page 5-5.) Move the rods to their full outer position. NOTE: TO GAIN ENOUGH CLEARANCE FOR CRANKSHAFT REMOVAL, FIRST REMOVE THE CYLINDER HEAD END HEADS OR VVCP’S, THE PISTON AND ROD ASSEMBLY, AND THE WIPER GLAND. WITHOUT THESE COMPONENTS, THE CROSSHEAD AND CONNECTING ROD MAY BE PUSHED FAR ENOUGH INTO THE SLIDE BORE TO ALLOW CRANKSHAFT REMOVAL Drive End Oil Slinger 2-Throw Crankshaft 13” (33 cm) Long 5/8-11 UNC Threaded Rod 5/8-11 UNC Lock Nut Crankshaft Main Bearing Journals Crank Pins Counterweights Direct Sprocket Mounting 2- & 4-Throw - Typical FIGURE 5-13 CRANKSHAFT 5/8-11 UNC (Jack Nut) Turn this Nut to Jack Bearing Cap Straight Up. Drill 11/16” (18mm) Hole 5/8-11 UNC Puller Hole Spacer or Flywheel FIGURE 5-14 MAIN BEARING CAP PULLER - TYPICAL 6-Throw Crankshaft w/ Adapter Sprocket Mounting Bolt-On Adapter 28-1/2” (73 cm) Long Steel Bar Oil Pump Sprocket FF Lube Sprocket 7. Remove the cap screws on the chain adjustment caps. Turn the caps to loosen the chains. Slip the chains off the crankshaft sprockets. If chains have a master link, remove the link to allow chains to be removed. PAGE 5 - 20 7/09
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FOR MODELS: JGZ AND JGU SECTION 5 - MAINTENANCE<br />
6. Detach the connecting rods. (See “Connecting Rod - Removal” on Page 5-5.)<br />
Move the rods to their full outer position.<br />
NOTE: TO GAIN ENOUGH CLEARANCE FOR CRANKSHAFT REMOVAL, FIRST<br />
REMOVE THE CYLINDER HEAD END HEADS OR VVCP’S, THE PISTON AND<br />
ROD ASSEMBLY, AND THE WIPER GLAND. WITHOUT THESE COMPONENTS,<br />
THE CROSSHEAD AND CONNECTING ROD MAY BE PUSHED FAR ENOUGH<br />
INTO THE SLIDE BORE TO ALLOW CRANKSHAFT REMOVAL<br />
Drive End<br />
Oil Slinger<br />
2-Throw<br />
Crankshaft<br />
13” (33 cm) Long<br />
5/8-11 UNC<br />
Threaded Rod<br />
5/8-11 UNC<br />
Lock Nut<br />
Crankshaft<br />
Main Bearing Journals<br />
Crank Pins<br />
Counterweights<br />
Direct Sprocket Mounting<br />
2- & 4-Throw - Typical<br />
FIGURE 5-13 CRANKSHAFT<br />
5/8-11 UNC<br />
(Jack Nut)<br />
Turn this Nut to Jack<br />
Bearing Cap Straight Up.<br />
Drill 11/16” (18mm) Hole<br />
5/8-11 UNC<br />
Puller Hole<br />
Spacer or<br />
Flywheel<br />
FIGURE 5-14 MAIN BEARING CAP PULLER - TYPICAL<br />
6-Throw Crankshaft w/<br />
Adapter Sprocket Mounting<br />
Bolt-On<br />
Adapter<br />
28-1/2” (73 cm) Long<br />
Steel Bar<br />
Oil Pump<br />
Sprocket<br />
FF Lube<br />
Sprocket<br />
7. Remove the cap screws on the chain adjustment caps. Turn the caps to loosen<br />
the chains. Slip the chains off the crankshaft sprockets. If chains have a master<br />
link, remove the link to allow chains to be removed.<br />
PAGE 5 - 20 7/09
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