INSTRUCTIONS-PARTS LIST This manual contains important warnings and information. READ AND KEEP FOR REFERENCE. 308–618 First choice when quality counts. Rev. C Supersedes Rev. B INSTRUCTIONS Viscount I Hydraulic Motor 1500 psi (10 MPa, 102 bar) Maximum Hydraulic Input Pressure Model 238–356, Series C 06168 GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN http://www.graco.com COPYRIGHT 1996, GRACO INC. Graco Inc. is registered to I.S.
Table of Contents Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Required Tools . . . . . . . . . . . . . . . . . . . . . . . . .
WARNING INJECTION HAZARD Spray from the gun, leaks or ruptured components can inject fluid into your body and cause extremely serious injury, including the need for amputation. Fluid splashed in the eyes or on the skin can also cause serious injury. Fluid injected into the skin is a serious injury. The injury may look like just a cut, but it is a serious injury. Get immediate medical attention. Do not point the gun at anyone or at any part of the body.
WARNING FIRE AND EXPLOSION HAZARD Improper grounding, poor ventilation, open flames or sparks can cause a hazardous condition and result in a fire or explosion and serious injury. Ground the equipment and the object being sprayed. Refer to Grounding on page 5. If there is any static sparking or you feel an electric shock while using this equipment, stop spraying immediately. Do not use the equipment until you identify and correct the problem.
Installation General Information NOTE: Reference numbers and letters in parentheses in the text refer to the callouts in the figures and the parts drawing. NOTE: Always use Genuine Graco Parts and Accessories, available from your Graco distributor. Hydraulic power supply: Follow manufacturer’s recommendations. Spray gun: Ground through connection to a properly grounded fluid hose and pump. Fluid supply container: Follow your local code. Object being sprayed: Follow your local code.
Operation Startup Pressure Relief Procedure Before each use, check the hydraulic fluid level and add fluid as necessary to fill the lines. WARNING FIRE HAZARD If hydraulic oil becomes too hot, it can reach its flash point and cause a fire. Operating at too high an oil temperature can also cause faster motor seal wear and leakage. The recommended hydraulic oil operating temperature is 80 to 115 F (27 to 45 C).
Troubleshooting Problem Hydraulic Motor stops running. Cause Solution Worn valve or valve balls (3); broken valve spring (18). Repair valve. See page 8. Broken trip rod (17), spring (12) or retainers (11). Replace parts. See page 8. Poor performance or reduced efficiency. Worn piston seals (5, 6, 7). Replace seals. See page 8. Oil leaking around cylinder. Worn cylinder o-rings (2). Replace o-rings. See page 8. Loose tie rods (37). Tighten nuts (27). See page 10.
Service Hydraulic Motor Disassembly NOTE: Repair Kit 236–698 is available. For the best results, use all the parts in the kit. Kit parts are marked with an asterisk, for example (2*). NOTE: When disassembling, lay out all parts in sequence, to make reassembly easier. Clean and inspect all parts for wear or damage before reassembling. Replace as necessary. 1. Remove the hydraulic motor from the pump as explained in the separate system manual. Lay it on its side in a pan. 2.
Service 23 *24 22 27 28 31 29 5* 6* 7* 20* 49* 1 38 N 50 39 32 19 3 16 13* 14* 8* 15* 11 2* 36 12* 4 11 48* 37 25 26 32(Ref) 52 *18 *3 9 N 28 27 17 39 (Ref) *2 N 10 33 *2 38 34 35 06172A Fig.
Service Hydraulic Motor Reassembly 1. Install the block packing (14*) and wiper (15*) in the housing retainer (36). The spring of the block packing and the lips of the wiper must face up. Install the o-ring (2*) on the top surface of the retainer. See Fig. 2. 2. Install the bearing (13*) and block packing (49*) in the bottom cylinder cap (35). The lips of the block packing must face up. 3. Reassemble the housing retainer (36) and the bottom cylinder cap (35). 4.
Service Spring faces up. Apply primer to threads and let dry 3 to 4 minutes. Lips face up. Apply 1 or 2 drops of thread sealant to female threads. Apply thread sealant to female threads. Torque to 42 to 45 in-lb (4.7 to 5.1 N-m). Torque to 54 to 56 in-lb (6.1 to 6.3 N-m). Torque to 30 to 40 ft-lb (41 to 54 N-m). Wide end faces yoke (4).
Viscount I Hydraulic Motor Parts Model 238–356, Series C 23 *24 22 27 28 31 29 5* 6* 7* 20* 49* 1 38 50 39 32 19 3 16 13* 14* 8* 15* 11 2* 36 12* 4 11 48* 37 25 26 32(Ref) 52 *18 *3 9 28 27 17 39 (Ref) *2 10 33 *2 38 34 35 06172A Fig.
ViscountR I Hydraulic Motor Parts Model 238–356, Series C Ref No. Part No.
Accessories Use Only Genuine Graco Parts and Accessories Graco-Approved Hydraulic Fluid Assembly Tool 189–305 Premium, ISO grade 46 petroleum-based hydraulic oil containing rust and oxidation exhibitors and anti-wear agents. 210_F (99_C) Flash Point. Required for reassembling the motor. 169–236 5 gallon (20 liter) 207–428 1 gallon (3.8 liter) Technical Data Maximum hydraulic fluid input pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Notes 308-618 15
Graco Standard Warranty Graco warrants all equipment manufactured by Graco and bearing its name to be free from defects in material and workmanship on the date of sale by an authorized Graco distributor to the original purchaser for use. With the exception of any special, extended, or limited warranty published by Graco, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment determined by Graco to be defective.
