Caterpillar 305SR Mini Hydraulic Excavator ( K4N Engine) Parts Manual – PDF DOWNLOAD
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Cat 305SR Mini Hydraulic Excavator ( K4N Engine) Parts Manual – PDF DOWNLOADCat 305SR Mini Hydraulic Excavator ( K4N Engine) Parts Manual – PDF DOWNLOAD
DESCRIPTION:
Official Factory Parts Reference
Cat 305SR Mini Hydraulic Excavator
K4N Engine | Complete Parts Manual | PDF Download
Serial: DCR00001-Up
⚡ INSTANT PDF DOWNLOAD ✓ No Shipping ✓ Available in Minutes ✓ Same Manual Used by CAT Dealers
When your Cat 305SR mini excavator needs parts — whether you’re a workshop technician, fleet manager, or owner-operator — you need the exact same reference guide that authorized Caterpillar dealers rely on. This is it. Every assembly, every subgroup, every component broken down to part number level, covering the complete machine from engine internals to track hardware.
Machine ID
17-Character PIN
ISO 10261 compliant format for accurate parts identification
Coverage
340+ Page Groups
Engine, hydraulics, undercarriage, cab, electrics & more
Format
Digital PDF
Download immediately after purchase — no waiting, no courier
About This Manual
Parts are presented as information elements — every component group for the 305SR model is listed alphabetically by part name and secondarily by part number. A dedicated Maintenance Parts Index at the front of the manual cross-references the most frequently used parts by description, quantity, usage, and page number for rapid field lookup.
When ordering, specify: quantity · part number · part name · machine serial/PIN — exactly the workflow your dealer follows.
Complete Parts Index
Table of Contents — All Component Groups
01
Engine & Powertrain
Component Group
Pages
Engine Arrangement
6–7
Installation Arrangement
8
Cylinder Block Group
9
Rod and Piston Group
10
Cylinder Head Group
11
Crankshaft Group / Crankshaft Pulley Group
12–13
Camshaft Group
13
Flywheel Group / Flywheel Housing Group
14
Front Housing Group / Valve Mechanism Group
15–16
Valve Mechanism Cover Group / Oil Pan Group
17
Engine Oil Pump Group / Oil Pump Assembly
18–19
Oil Cooler and Radiator Group
20–21
Radiator Group
22–23
Water Pump Group
24–25
Suction Fan Group
26
Inlet Manifold Group / Modification Arrangement
27
Air Lines Group / Air Cleaner Group
28–29
Exhaust Muffler Group / Muffler Group
30–32
Exhaust Extension Group
33
Governor Control Group / Fuel Tank and Mounting Group / Control Assembly
34–35
Fuel Tank Group / Fuel Lines Group
36–37
Fuel Filter Group
38–40
Fuel Injection Pump Group / Fuel Injection Pump Assembly
41–43
Governor Group
44–45
02
Electrical & Instrumentation
Component Group
Pages
Electric Starting Motor Group
46–47
Charging Alternator Group
48–49
Battery and Wiring Group
50–51
Relay Panel Wiring Group
52–53
Front Wiring Group
54–55
Console Wiring Group
56–67
Wiring Group
68–75
Travel Alarm Group
76–77
Cluster Gauge Group
100
Heat Start Switch Group / Start Switch Group
101–102
Lighting Group
103–105, 108–109
Cab Lighting Group
106–107
Flood Lamp Group
110–111
Glow Plug Group
111
Sensor and Mounting Group
112–113, 242
Electric Horn Group
296–297
Monitor Control Group / Monitor Group
298, 300–307
Tilt Switch Group
322
03
Hydraulic System
Component Group
Pages
Hydraulic Arrangement
163
Control Arrangement / Shutoff Valve Arrangement
164
Hydraulic Tank and Mounting Group / Hydraulic Tank and Filter Group
165–167
Pump and Mounting Group
168–169
Main Pump Group
170–171
Piston Pump Group
172–173
Pilot Lines Group
174–183
Front Lines Group
184–187
Pump Lines Group
188
Swing Motor Lines Group
189
Return Lines Group
190–191
Track Motor Lines Group
192
Boom Lines Group
193
Offset Control Group
194
Valve and Mounting Group
136–137, 195
Control Valve Group
196–197
Block Assembly
198–201
Pattern Change Valve Group / Selector and Flow Control Valve Group
202–203
Pilot Valve Group
204–207, 212–218
Valve Group / Manifold Valve Group / Manifold and Valve Group
208–210
Pressure Reducing Solenoid Valve Group / Accumulator Group
211
Drive Control Group
219
Cylinder Lines Group / Boom Cylinder Lines Group / Stick Cylinder Lines Group
221, 232–233
Stick Lines Group / Bucket Lines Group
222–224
Swivel Lines Group / Swivel Group
225–231
2 Speed Control Group
231
04
Undercarriage & Power Train
Component Group
Pages
Power Train Arrangement
114
Final Drive Group / Non-Segment Sprocket Group
114–115
Swing Drive Group / Swing Motor Group
115, 118
Travel Motor Group
116–117
Reduction Group / Valve Kit / Motor Kit
119–121
Undercarriage Arrangement / Undercarriage Frame Group
147, 150
Bearing and Gear Group
148–149
Front Idler Group / Idler Assembly
151–153
Track and Carrier Roller Group / Track Roller Group
154–155
Track Arrangement / Track Group / Track Assembly / Link Assembly
156–161
Rubber Pad Group / Track Guiding Guard Group
160, 162
05
Upper Structure, Frame & Body
Component Group
Pages
Chassis Arrangement / Fastener Group
122–123
Bottom Guard Group
124
Upper Frame Group
125–127
Hood and Guard Group / Engine Hood Group
128–131
Fender Cover Group
132–133
Tank Cover Group
134–135
Firewall Group / Firewall Assembly
138–143
Engine Mounting Group / Counterweight Group
144–146
Side Cover Group
320–321
06
Boom, Stick, Bucket & Work Tools
Component Group
Pages
Boom Arrangement / Boom Group
220, 248–249
Stick Arrangement / Stick Group
240, 250–252
Cylinder Group
234–238
Cylinder Guard Group
253–254
Bucket Linkage Arrangement / Bucket Linkage Group
239, 244–246
Bucket Adjuster Group / Bucket and Adjuster Group / Bucket Group
242, 247, 258–260
Blade Control Group / Front Guard Group / Offset Lock Group
Cab Door Group / Front Door Group / Frame Assembly
276–279
Operator Platform Group
280–282
Platform Mounting Group / Monitor and Mounting Group
283–284
Operator Console Group / Console Group
285–288
Seat Group / Seat Belt Group
289
Seat Support Group / Seat Support Assembly
290–294
Washer Group
295
Cooler Arrangement / Cooler and Mounting Group / Cooler Lines Group / Cooler Wiring Group
311–316
Condenser and Mounting Group / Refrigerant Compressor Group
315, 317
Heater Lines Group / Heater Group / Heater Wiring Group
308–310
08
General, Reference & Miscellaneous
Component Group
Pages
General Arrangement / Special Arrangement
1–5
Mirror Arrangement / Handle Group
318–319
Film Group
324–341
Tool Group
342
Literature Group
341
Why This Manual Pays For Itself
Stop Guessing. Start Knowing Exactly What You Need.
One Wrong Part Order
A single incorrect parts order — the shipping, the delay, the return — costs more than this manual. Know the exact part number before you pick up the phone.
The Dealer’s Own Reference
This is the same factory parts manual your authorized CAT dealer uses at the counter. Get access to that same knowledge — on your device, instantly.
Search, Zoom, Reference
PDF format means full text search. Find any component group, part number, or assembly in seconds — no flipping pages under a machine in the dark.
Instant. Permanent. Yours.
Payment confirmed → download link in under 2 minutes. No courier. No backorder. No waiting. The manual is yours to keep, print, and use indefinitely.
Please note: This is a digital product. No physical copy will be shipped. Upon successful payment you will be redirected to the download page immediately. This is not a service manual or repair manual — it is the official factory parts manual for the Cat 305SR (K4N Engine), Serial DCR00001-Up.
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