Table of Contents
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Table of Contents
Summary of Contents for Demco LIL'THUMPER
- Page 1 AP20005, Rev 14 01/16 LIL’THUMPER Piston Pump Page 1...
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Page 2: Table Of Contents
Thank you for purchasing a Demco Lil’ Thumper pump. We feel you have made a wise choice and hope you are completely satisfied with your new pump. If you have any questions regarding the applica- tions of certain solutions or chemicals, contact your chemical supplier and follow chemical manufacturer recommendations as well as all licensing and use restrictions or regulations. -
Page 3: Bolt Torque
bOLT TORQUE TORQUE DATA FOR STANDARD NUTS, bOLTS, AND CAPSCREWS. Tighten all bolts to torques specified in chart unless otherwise noted. Check tightness of bolts periodically, using bolt chart as guide. Replace hardware with same grade bolt. NOTE: Unless otherwise specified, high-strength Grade 5 hex bolts are used throughout as- sembly of equipment. -
Page 4: Mounting The Pump And Lubrication Requirements
SUGGESTED GROUND DRIvE MOUNTING MOUNTING THE PISTON PUMP The Lil’ Thumper pump should be mounted firmly to the implement so the pump is in a horizontal position when operating (as shown above). The drive sprocket (#1) on the pump and the ground wheel drive sprocket (#2) must be in line to prevent chain jumping and undue wear. -
Page 5: Rate Adjustment And Start-Up Procedure
RATE ADjUSTMENT Application rate for the Lil’ Thumper is determined by using the slide chart included with the pump. Complete instructions are on the back of the slide chart. Pump output is determined by the drive wheel loaded radius, sprocket ratios, and pump adjustment disc setting. -
Page 6: Suggested Plumbing
ON ARE THE PROPERTY OF .XX = ±.030 BREAK ALL SHARP EDGES SCALE: 1:12 SHEET 1 OF 1 DEMCO .XXX = ±.010 BEND AND DRAFT ±1° Caution: To prevent personal injury, observe the following precaution. DO NOT install a shut-off valve in the discharge line as it may be left shut and cause extensive damage to the pump and hoses. -
Page 7: Single And Double Piston Parts Breakdown
OUTLET INLET OUTLET INLET Main Shaft bearing Pressed In Case 4010 320T BOYDE THE DRA INFOR ON ARE Cutaway view of Piston Wipers and Support Ring Showing Proper Installation. Page 7... -
Page 8: Single And Double Piston Pump Parts List
PISTON PUMP PARTS LIST REF. PART QTy. REF. PART QTy. PP1 PP2 DESCRIPTION PP1 PP2 DESCRIPTION 00087 5/16”-18UNC x 5/16” Socket Set Screw 01599 1-1/4” O.D. Main Shaft for PP2 00914 3/8”-16UNC x 1-1/2” Hex Bolt 01979 1-1/4” I.D. 18 Ga. Machine Bushing 01166 Pump Connecting Slide Cover 01989... -
Page 9: Manual Clutch Parts Breakdown And Parts List
ON ARE THE PROPERTY OF .XX = ±.030 BREAK ALL SHARP EDGES 00349 1/2”-13UNC x 6” Hex Head Bolt Gr. 5 SCALE: 1:8 DEMCO .XXX = ±.010 BEND AND DRAFT ±1° bracket (#20). Connect the return spring (#21) and remove 01525-30 Piston Pump Top Bracket any remaining shipping tape from the assembly. -
Page 10: Piston Wiper Replacement
ON ARE THE PROPERTY OF .XX = ±.030 BREAK ALL SHARP EDGES SCALE: 1:5 SHEET 1 OF 1 DEMCO .XXX = ±.010 BEND AND DRAFT ±1° 3. Remove stainless steel piston nut (J), and thrust washer 4. To reassemble: Place large o-ring (I) over the flare on (K). - Page 11 (A) and bolts. Do Not Tighten Clamps. ON ARE THE PROPERTY OF .XX = ±.030 BREAK ALL SHARP EDGES SCALE: 1 DEMCO .XXX = ±.010 BEND AND DRAFT ±1° 9. Tighten large center clamp (AA) first to draw cylinder hous- ings together, then tighten all remaining large and small clamps.
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Page 12: Stackpack Replacement
= .060 MIN. MACHINE SUFACE 250 ON ARE THE PROPERTY OF .XX = ±.030 BREAK ALL SHARP EDGES SCALE: 1:4 DEMCO SHEET 1 OF 2 .XXX = ±.010 BEND AND DRAFT ±1° 4. Oil stackpack and O-ring. Insert stackpack retainer assembly into pump by sliding it over the piston rod. -
Page 13: Determining Sprocket Ratios For Piston Pumps
DETERMINING SPROCKET RATIOS FOR PISTON PUMPS It may be difficult in some cases to determine the ratio of the drive for the pump system. The main determining factor is always the size of the driven sprocket in relation to the drive sprocket. Always divide the drive (powered) sprocket size by the driven sprocket (see examples below). -
Page 14: Routine Maintenance And Maintenance Record
ROUTINE MAINTENANCE 4. Change the oil in the drive case of your pump annually. Your Lil’ Thumper is designed to require only occasional This is done by removing the 1/2” fill plugs and the 1/4” light maintenance. Attention to the following procedures will significantly prolong the useful life of your pump. -
Page 15: Trouble Shooting And Pump Storage
TROUbLE SHOOTING FOR PISTON PUMP PRObLEM PRObAbLE CAUSE SOLUTION Pump will not prime valves fouled Clean valves Piston wipers worn Replace Wipers Strainer plugged Clean strainer Sucking air in suction line Repair line Air lock in suction line Reroute suction line Worn piston Replace piston Pump puts out too little... -
Page 16: Pump And Sprayer Checklist
Replace all worn or damaged parts. NOTE: DEMCO does not and will not make any recommendations concerning application of various chemicals or solutions. These recommendations relate to either amount or procedure of materials applied. If you have any questions regarding application of certain chemicals or solutions, contact your chemical supplier and follow chemical manufacturer recommendations.
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