MAINTENANCE SCHEDULE
Model 621 C / 721 C
Instructions
AS REQUIRED
1002-5
22 SERVICE THE AIR CLEANER IF THE AIR CLEANER WARNING LAMP ILLUMINATES ........................... SEE OPERATORS MANUAL
37 SERVICE AIR CLEANER PRECLEANER .................................................................................................. SEE OPERATORS MANUAL
30 REPLACE THE TRANSMISSION FILTER
IF THE TRANSMISSION FILTER RESTRICTION WARNING LAMP ILLUMINATES ................................................. USE CASE FILTER
19 CHECK THE RADIATOR COOLANT LEVEL IF THE WARNING LAMP ILLUMINATES ............................... SEE OPERATORS MANUAL
6 REPLACE THE HYDRAULIC FILTERS IF THE HYDRAULIC FILTER WARNING LAMP ILLUMINATES ................... USE CASE FILTERS
20 CHECK THE FAN BELT CONDITION ........................................................................................................... REPLACE AS REQUIRED
CHECK THE AIR CONDITIONING DRIVE TENSION (IF EQUIPPED) NOT SHOWN ...................................... ADJUST AS REQUIRED
-- EVERY 10 HOURS OF OPERATION OR EACH DAY-WHICHEVER OCCURS FIRST
16 CHECK THE ENGINE OIL LEVEL ............................................................................................................. SEE OPERATORS MANUAL
--------- EVERY 50 HOURS OF OPERATION--------------
1 CHECK THE COOLANT RESERVOIR FLUID LEVEL ........................................................................ ETHYLENE GLYCOL AND WATER
29 CHECK THE TRANSMISSION OIL LEVEL (ENGINE RUNNING AND OIL WARM) .................................... SEE OPERATORS MANUAL
5 CHECK THE HYDRAULIC RESERVOIR FLUID LEVEL ............................................................................... SEE OPERATORS MANUAL
15 LUBRICATE THE REAR AXLE TRUNNION PIVOTS (2 FITTINGS) ................................................... CASE MOLYDISULFIDE GREASE
38 LUBRICATE THE BUCKET AND BELLCRANK PIVOT POINTS (10 FITTINGS) 621C/721
Cl XT ....... CASE MOLYDISULFIDE GREASE
27 LUBRICATE THE CENTER DRIVE SHAFT SLIP JOINT (1 FITTING) ............................................... CASE MOLYDISULFIDE GREASE
39 LUBRICATE THE BELLCRANK AND BUCKET PIVOTS (6 FITTINGS) 621 C/721 CZ-BAR ............... CASE MOLYDISULFIDE GREASE
----------EVERY 100 HOURS OF OPERATION--------------
7 LUBRICATE THE STEERING CYLINDER PIVOTS - ROD AND CLOSED END (4 FITTINGS) ............ CASE MOLYDISULFIDE GREASE
40 LUBRICATE THE LOADER LIFT ARM AND CYL. PIVOTS (7 FITTINGS) 621 C/721 CZ-BAR ........... CASE MOLYDISULFIDE GREASE
26 LUBRICATE THE FRONT DRIVE SHAFT SUPPPORT BEARING (1 FITTING) ................................. CASE MOLYDISULFIDE GREASE
32 LUBRICATE THE REAR DRIVE SHAFT SLIP JOINT (1 FITTING) .................................................... CASE MOLYDISULFIDE GREASE
8 LUBRICATE THE LOADER LIFT ARM AND CYLINDER PIVOTS (14 FITTINGS) 621C/721C/ XT ...... CASE MOLYDISULFIDE GREASE
-------------r-VERY 250 HOURS OF OPERATION -------------
19 CHECK THE RADIATOR COOLANT LEVEL .................................................................................... ETHYLENE GLYCOL AND WATER
2 CHANGE THE ENGINE OIL AND REPLACE THE ENGINE OIL FILTER ..................................................... SEE OPERATORS MANUAL
34 CHECK THE BATTERY FLUID LEVEL ...................................................................................................... SEE OPERATORS MANUAL
36 CHECK THE TIRE CONDITION AND AIR PRESSURE ............................................................................. SEE OPERATORS MANUAL
12 CLEAN THE CAB AIR FILTERS (IF EQUIPPED) ....................................................................................... SEE OPERATORS MANUAL
25 REPLACE ENGINE COOLING SYSTEM FILTER 721C .......................................................................................... USE CASE FILTER
--------- EVERY 500 HOURS OF OPERATION-------------
3 REPLACE THE FUEL FILTERS .............................................................................................................................. USE CASE FILTERS
33 DRAIN WATER AND SEDIMENT FROM THE FUEL TANK ........................................................................ SEE OPERATORS MANUAL
14 REPLACE THE IN-LINE FUEL FILTER .................................................................................................................. USE CASE FILTERS
----------EVERY 1000 HOURS OF OPERATION--------------
21 CHECK THE ENGINE VALVE CLEARANCES ................................................................................................. SEE SERVICE MANUAL
6 REPLACE THE HYDRAULIC FILTERS .................................................................................................................... USE CASE FILTERS
30 REPLACE THE TRANSMISSION OIL FILTER ....................................................................................................... USE CASE FILTERS
28 CHANGE THE TRANSMISSION OIL ......................................................................................................... SEE OPERATORS MANUAL
23 CLEAN THE TRANSMISSION BREATHER ..................................................................................................... CLEAN WITH SOLVENT
24 LUBRICATE THE UPPER AND LOWER CHASSIS PIVOTS (2 FITTINGS) ....................................... CASE MOLYDISULFIDE GREASE
31 CHANGE THE FRONT/REAR AXLE DIFFERENTIAL AND PLANETARY OIL ............................................ SEE OPERATORS MANUAL
- EVERY 2000 HOURS OF OPERATION OR EACH YEAR - WHICHEVER OCCURS FIRST -----
4 CHANGE THE HYDRAULIC OIL AND CLEAN THE SCREEN ..................................................................... SEE OPERATORS MANUAL
18 DRAIN, FLUSH AND REFILL THE ENGINE COOLING SYSTEM .................................................... ETHYLENE GLYCOL AND WATER
22 REPLACE THE AIR CLEANER ELEMENTS .......................................................................................................... USE CASE FILTERS
NOTE: When you drain, flush and refill the engine cooling system, add one container (0.5L) of
Case cooling system treatment, and replace the cooling filter on 721 C.
Bur 7-12131 Issued 4-00
Printed in U.S.A.
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